diff --git a/.devcontainer/.gitignore b/.devcontainer/.gitignore
index ba48761..63f880a 100644
--- a/.devcontainer/.gitignore
+++ b/.devcontainer/.gitignore
@@ -7,6 +7,7 @@
 !/conf/shell/var/
 !/conf/shell/var/tmp/
 !/conf/shell/var/tmp/snippets/
+!/debian-*/
 !/scripts/
 !/scripts/usr/
 !/scripts/usr/local/
@@ -14,10 +15,12 @@
 
 !/conf/shell/etc/skel/.profile
 !/conf/shell/var/tmp/snippets/*.sh
+!/debian-*/devcontainer.json
 !/scripts/usr/local/bin/*.sh
 
 !/.gitignore
 !/devcontainer.json
+!/Debian.Dockerfile
 !/R.Dockerfile
 !/LICENSE
 !/README.md
diff --git a/.devcontainer/Debian.Dockerfile b/.devcontainer/Debian.Dockerfile
new file mode 100644
index 0000000..e8c0cd5
--- /dev/null
+++ b/.devcontainer/Debian.Dockerfile
@@ -0,0 +1,460 @@
+ARG BASE_IMAGE=debian
+ARG BASE_IMAGE_TAG=latest
+ARG R_VERSION=latest
+
+FROM docker.io/koalaman/shellcheck:stable as sci
+
+FROM ${BASE_IMAGE}:${BASE_IMAGE_TAG} as files
+
+RUN mkdir /files
+
+COPY conf/shell /files
+COPY scripts /files
+
+  ## Ensure file modes are correct
+RUN find /files -type d -exec chmod 755 {} \; \
+  && find /files -type f -exec chmod 644 {} \; \
+  && find /files/usr/local/bin -type f -exec chmod 755 {} \; \
+  && cp -r /files/etc/skel/. /files/root \
+  && bash -c 'rm -rf /files/root/{.bashrc,.profile}' \
+  && chmod 700 /files/root
+
+# Build R according to https://github.com/b-data/rsi
+FROM ${BASE_IMAGE}:${BASE_IMAGE_TAG} as rsi
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+ARG COMPILER
+ARG COMPILER_VERSION
+ARG CXX_STDLIB
+
+# hadolint ignore=DL3008,SC2086
+RUN CXX_STDLIB_VERSION=${CXX_STDLIB:+$COMPILER_VERSION} \
+  && apt-get update \
+  && apt-get install -y --no-install-recommends \
+    dpkg-dev \
+    "${CXX_STDLIB:-g++}${CXX_STDLIB_VERSION:+-}${CXX_STDLIB_VERSION}${CXX_STDLIB:+-dev}" \
+    libc6-dev \
+    make \
+    ca-certificates \
+    "${COMPILER:-gcc}${COMPILER_VERSION:+-}${COMPILER_VERSION}" \
+    gfortran \
+    libbz2-* \
+    '^libcurl[3|4]$' \
+    libicu* \
+    '^libjpeg.*-turbo.*' \
+    liblzma* \
+    "${BLAS:-liblapack-dev}" \
+    libpangocairo-* \
+    libpaper-utils \
+    '^libpcre[2|3]*' \
+    libpng-dev \
+    libreadline-dev \
+    '^libtiff[5|6]$' \
+    unzip \
+    zip \
+    zlib1g \
+  && BUILDDEPS="curl \
+    default-jdk \
+    #libbz2-dev \
+    libcairo2-dev \
+    libcurl4-openssl-dev \
+    libpango1.0-dev \
+    libjpeg-dev \
+    libicu-dev \
+    #libpcre2-dev \
+    #libpng-dev \
+    #libreadline-dev \
+    libtiff-dev \
+    #liblzma-dev \
+    libx11-dev \
+    libxt-dev \
+    perl \
+    rsync \
+    subversion \
+    tcl-dev \
+    tk-dev \
+    texinfo \
+    texlive-extra-utils \
+    texlive-fonts-recommended \
+    texlive-fonts-extra \
+    texlive-latex-recommended \
+    texlive-latex-extra \
+    x11proto-core-dev \
+    xauth \
+    xfonts-base \
+    xvfb \
+    wget \
+    zlib1g-dev" \
+  && apt-get install -y --no-install-recommends $BUILDDEPS
+
+ARG R_VERSION
+ARG CONFIG_ARGS="--enable-R-shlib \
+  --enable-memory-profiling \
+  --with-readline \
+  --with-blas \
+  --with-lapack \
+  --with-tcltk \
+  --with-recommended-packages"
+
+ARG PREFIX=/usr/local
+
+# hadolint ignore=DL3003,DL3008,SC2034
+RUN if [ "$R_VERSION" = "devel" ]; then \
+    R_SRC="base-prerelease/R-devel.tar.gz"; \
+  elif [ "$R_VERSION" = "patched" ]; then \
+    R_SRC="base-prerelease/R-latest.tar.gz"; \
+  elif [ "$R_VERSION" = "latest" ]; then \
+    R_SRC="base/R-latest.tar.gz"; \
+  else \
+    R_SRC="base/R-${R_VERSION%%.*}/R-${R_VERSION}.tar.gz"; \
+  fi \
+  && cd /tmp \
+  && wget --progress=dot:mega https://cran.r-project.org/src/${R_SRC} -O "R.tar.gz" \
+  && tar zxf R.tar.gz --no-same-owner \
+  && cd R-* \
+  && export ${COMPILER:+CC="${COMPILER}${COMPILER_VERSION:+-}${COMPILER_VERSION}"} \
+  && export ${COMPILER:+CXX="${COMPILER}++${COMPILER_VERSION:+-}${COMPILER_VERSION}"} \
+  && export ${CXX_STDLIB:+CXX="$CXX -stdlib=${CXX_STDLIB}"} \
+  && R_PAPERSIZE=letter \
+  && R_BROWSER=xdg-open \
+  && PAGER=/usr/bin/pager \
+  && PERL=/usr/bin/perl \
+  && R_UNZIPCMD=/usr/bin/unzip \
+  && R_ZIPCMD=/usr/bin/zip \
+  && R_PRINTCMD=/usr/bin/lpr \
+  && LIBnn=lib \
+  && AWK=/usr/bin/awk \
+  && CFLAGS="-g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -g" \
+  && CXXFLAGS="-g -O2 -fstack-protector-strong -Wformat -Werror=format-security -Wdate-time -D_FORTIFY_SOURCE=2 -g" \
+  && ./configure ${CONFIG_ARGS} --prefix=${PREFIX} \
+  && make \
+  && make install-strip \
+  && echo "_R_SHLIB_STRIP_=true" >> ${PREFIX}/lib/R/etc/Renviron.site
+
+FROM ${BASE_IMAGE}:${BASE_IMAGE_TAG}
+
+ARG DEBIAN_FRONTEND=noninteractive
+
+ARG BASE_IMAGE
+ARG BASE_IMAGE_TAG
+ARG BLAS=libopenblas-dev
+ARG COMPILER
+ARG COMPILER_VERSION
+ARG CXX_STDLIB
+ARG CRAN
+
+ENV BASE_IMAGE=${BASE_IMAGE}:${BASE_IMAGE_TAG} \
+    CRAN=${CRAN}
+
+ENV LANG=en_US.UTF-8 \
+    TERM=xterm \
+    TZ=Etc/UTC
+
+# Setup according to
+# https://github.com/b-data/r-docker-stack/blob/main/ver/latest.Dockerfile
+COPY --from=rsi /usr/local /usr/local
+
+# hadolint ignore=DL3008
+RUN apt-get update \
+  ## Copy script checkbashisms from package devscripts
+  && apt-get install -y --no-install-recommends devscripts \
+  && cp -a /usr/bin/checkbashisms /usr/local/bin/checkbashisms \
+  && apt-get remove -y --purge devscripts \
+  && apt-get autoremove -y \
+  ## Install R runtime dependencies
+  && CXX_STDLIB_VERSION=${CXX_STDLIB:+$COMPILER_VERSION} \
+  && apt-get install -y --no-install-recommends \
+    dpkg-dev \
+    "${CXX_STDLIB:-g++}${CXX_STDLIB_VERSION:+-}${CXX_STDLIB_VERSION}${CXX_STDLIB:+-dev}" \
+    libc6-dev \
+    make \
+    ca-certificates \
+    "${COMPILER:-gcc}${COMPILER_VERSION:+-}${COMPILER_VERSION}" \
+    gfortran \
+    "${CXX_STDLIB}${CXX_STDLIB:+abi}${CXX_STDLIB_VERSION:+-}${CXX_STDLIB_VERSION}${CXX_STDLIB:+-dev}" \
+    libbz2-dev \
+    '^libcurl[3|4]$' \
+    libicu-dev \
+    '^libjpeg.*-turbo.*-dev$' \
+    liblapack-dev \
+    liblzma-dev \
+    ${BLAS} \
+    libpangocairo-1.0-0 \
+    libpaper-utils \
+    '^libpcre[2|3]-dev$' \
+    libpng-dev \
+    libreadline-dev \
+    '^libtiff[5|6]$' \
+    pkg-config \
+    unzip \
+    zip \
+    zlib1g \
+  ## Additional packages
+  && apt-get install -y --no-install-recommends \
+    bash-completion \
+    file \
+    gsfonts \
+    locales \
+    tzdata \
+  ## Misc packages (Debian unstable)
+    libdeflate-dev \
+    libtirpc-dev \
+  ## Switch BLAS/LAPACK (manual mode)
+  && if [ "${BLAS}" = "libopenblas-dev" ]; then \
+    update-alternatives --set "libblas.so.3-$(uname -m)-linux-gnu" \
+      "/usr/lib/$(uname -m)-linux-gnu/openblas-pthread/libblas.so.3"; \
+    update-alternatives --set "liblapack.so.3-$(uname -m)-linux-gnu" \
+      "/usr/lib/$(uname -m)-linux-gnu/openblas-pthread/liblapack.so.3"; \
+  fi \
+  ## Update locale
+  && sed -i "s/# $LANG/$LANG/g" /etc/locale.gen \
+  && locale-gen \
+  && update-locale LANG=$LANG \
+  ## Add directory for site-library
+  && RLS="$(Rscript -e "cat(Sys.getenv('R_LIBS_SITE'))")" \
+  && mkdir -p "${RLS}" \
+  ## Set configured CRAN mirror
+  && echo "options(repos = c(CRAN='$CRAN'), download.file.method = 'libcurl')" >> "$(R RHOME)/etc/Rprofile.site" \
+  ## Use littler installation scripts
+  && Rscript -e "install.packages(c('littler', 'docopt'), repos = '$CRAN')" \
+  && ln -s "${RLS}/littler/examples/install2.r" /usr/local/bin/install2.r \
+  && ln -s "${RLS}/littler/examples/installGithub.r" /usr/local/bin/installGithub.r \
+  && ln -s "${RLS}/littler/bin/r" /usr/local/bin/r \
+  ## Clean up
+  && rm -rf /tmp/* \
+  && rm -rf /var/lib/apt/lists/*
+
+# Setup according to
+# https://github.com/b-data/r-docker-stack/blob/main/base/latest.Dockerfile
+
+## Installing V8 on Linux, the alternative way
+## https://ropensci.org/blog/2020/11/12/installing-v8
+ENV DOWNLOAD_STATIC_LIBV8=1
+
+## Disable prompt to install miniconda
+ENV RETICULATE_MINICONDA_ENABLED=0
+
+# hadolint ignore=DL3008
+RUN apt-get update \
+  && apt-get -y install --no-install-recommends \
+    bash-completion \
+    curl \
+    file \
+    fontconfig \
+    gnupg \
+    htop \
+    info \
+    jq \
+    libclang-dev \
+    man-db \
+    nano \
+    ncdu \
+    procps \
+    psmisc \
+    screen \
+    sudo \
+    swig \
+    tmux \
+    vim-tiny \
+    wget \
+    zsh \
+    ## Install Git
+    git \
+    ## Git: Additional runtime recommendations
+    less \
+    ssh-client \
+    ## Install Git LFS
+    git-lfs \
+    ## Install pandoc
+    pandoc \
+  ## Python: Additional dev dependencies
+  && if [ -z "$PYTHON_VERSION" ]; then \
+    apt-get -y install --no-install-recommends \
+      python3-dev \
+      ## Install Python package installer
+      ## (dep: python3-distutils, python3-setuptools and python3-wheel)
+      python3-pip \
+      ## Install venv module for python3
+      python3-venv; \
+    ## make some useful symlinks that are expected to exist
+    ## ("/usr/bin/python" and friends)
+    for src in pydoc3 python3 python3-config; do \
+      dst="$(echo "$src" | tr -d 3)"; \
+      if [ -s "/usr/bin/$src" ] && [ ! -e "/usr/bin/$dst" ]; then \
+        ln -svT "$src" "/usr/bin/$dst"; \
+      fi \
+    done; \
+  else \
+    ## Force update pip, setuptools and wheel
+    curl -sLO https://bootstrap.pypa.io/get-pip.py; \
+    python get-pip.py \
+      pip \
+      setuptools \
+      wheel; \
+    rm get-pip.py; \
+  fi \
+  ## Git: Set default branch name to main
+  && git config --system init.defaultBranch main \
+  ## Git: Store passwords for one hour in memory
+  && git config --system credential.helper "cache --timeout=3600" \
+  ## Git: Merge the default branch from the default remote when "git pull" is run
+  && git config --system pull.rebase false \
+  ## Clean up
+  && rm -rf /tmp/* \
+  && rm -rf /var/lib/apt/lists/*
+
+# hadolint ignore=DL3008,DL3013
+RUN apt-get update \
+  && apt-get -y install --no-install-recommends \
+    ## Current ZeroMQ library for R pbdZMQ
+    libzmq3-dev \
+    ## Required for R extension
+    libcairo2-dev \
+    libcurl4-openssl-dev \
+    libfontconfig1-dev \
+    libssl-dev \
+    libtiff-dev \
+    libxml2-dev \
+  ## Install radian
+  && export PIP_BREAK_SYSTEM_PACKAGES=1 \
+  && pip install --no-cache-dir radian \
+  ## Clean up
+  && rm -rf /tmp/* \
+  && rm -rf /var/lib/apt/lists/* \
+    /root/.cache
+
+# Dev Container
+ARG NCPUS
+
+# hadolint ignore=DL3008,DL3015,SC2016
+RUN dpkgArch="$(dpkg --print-architecture)" \
+  ## Ensure that common CA certificates
+  ## and OpenSSL libraries are up to date
+  && apt-get update \
+  && apt-get -y install --only-upgrade \
+    ca-certificates \
+    openssl \
+  ## Required for devtools
+  && apt-get -y install --no-install-recommends \
+    libfribidi-dev \
+    libgit2-dev \
+    libharfbuzz-dev \
+  ## Install pak
+  && pkgType="$(Rscript -e 'cat(.Platform$pkgType)')" \
+  && os="$(Rscript -e 'cat(R.Version()$os)')" \
+  && arch="$(Rscript -e 'cat(R.Version()$arch)')" \
+  && install2.r -r "https://r-lib.github.io/p/pak/stable/$pkgType/$os/$arch" -e \
+    pak \
+  ## Install devtools, languageserver and decor
+  && install2.r -s -d TRUE -n "${NCPUS:-$(($(nproc)+1))}" -e \
+    devtools \
+    languageserver \
+    decor \
+  ## Clean up
+  && rm -rf /tmp/* \
+    /root/.cache \
+  ## Install hadolint
+  && case "$dpkgArch" in \
+    amd64) tarArch="x86_64" ;; \
+    arm64) tarArch="arm64" ;; \
+    *) echo "error: Architecture $dpkgArch unsupported"; exit 1 ;; \
+  esac \
+  && apiResponse="$(curl -sSL \
+    https://api.github.com/repos/hadolint/hadolint/releases/latest)" \
+  && downloadUrl="$(echo "$apiResponse" | grep -e \
+    "browser_download_url.*Linux-$tarArch\"" | cut -d : -f 2,3 | tr -d \")" \
+  && echo "$downloadUrl" | xargs curl -sSLo /usr/local/bin/hadolint \
+  && chmod 755 /usr/local/bin/hadolint \
+  ## Create backup of root directory
+  && cp -a /root /var/backups \
+  ## Clean up
+  && rm -rf /var/lib/apt/lists/*
+
+## Install common utils
+## https://github.com/devcontainers/features/blob/main/src/common-utils/main.sh
+ARG INSTALL_COMMON_UTILS
+
+# hadolint ignore=DL3008
+RUN if [ "$INSTALL_COMMON_UTILS" = "true" ]; then \
+    apt-get update; \
+    apt-get -y install --no-install-recommends \
+      apt-utils \
+      openssh-client \
+      gnupg2 \
+      dirmngr \
+      iproute2 \
+      procps \
+      lsof \
+      htop \
+      net-tools \
+      psmisc \
+      curl \
+      tree \
+      wget \
+      rsync \
+      ca-certificates \
+      unzip \
+      bzip2 \
+      xz-utils \
+      zip \
+      nano \
+      vim-tiny \
+      less \
+      jq \
+      lsb-release \
+      apt-transport-https \
+      dialog \
+      libc6 \
+      libgcc1 \
+      libkrb5-3 \
+      libgssapi-krb5-2 \
+      libicu[0-9][0-9] \
+      liblttng-ust[0-9] \
+      libstdc++6 \
+      zlib1g \
+      locales \
+      sudo \
+      ncdu \
+      man-db \
+      strace \
+      manpages \
+      manpages-dev \
+      init-system-helpers; \
+    fi \
+  ## Clean up
+  && rm -rf /var/lib/apt/lists/*
+
+ENV PACKAGES_ALREADY_INSTALLED=${INSTALL_COMMON_UTILS}
+
+# Update environment
+ARG USE_ZSH_FOR_ROOT
+ARG SET_LANG
+ARG SET_TZ
+
+ENV LANG=${SET_LANG:-$LANG} \
+    TZ=${SET_TZ:-$TZ}
+
+  ## Change root's shell to ZSH
+RUN if [ -n "$USE_ZSH_FOR_ROOT" ]; then \
+    chsh -s /bin/zsh; \
+  fi \
+  ## Update timezone if needed
+  && if [ "$TZ" != "Etc/UTC" ]; then \
+    echo "Setting TZ to $TZ"; \
+    ln -snf "/usr/share/zoneinfo/$TZ" /etc/localtime \
+      && echo "$TZ" > /etc/timezone; \
+  fi \
+  ## Add/Update locale if needed
+  && if [ "$LANG" != "en_US.UTF-8" ]; then \
+    sed -i "s/# $LANG/$LANG/g" /etc/locale.gen; \
+    locale-gen; \
+    echo "Setting LANG to $LANG"; \
+    update-locale --reset LANG="$LANG"; \
+  fi
+
+## Copy files as late as possible to avoid cache busting
+COPY --from=files /files /
+
+## Copy shellcheck as late as possible to avoid cache busting
+COPY --from=sci --chown=root:root /bin/shellcheck /usr/local/bin
diff --git a/.devcontainer/debian-stable-clang-libcpp/devcontainer.json b/.devcontainer/debian-stable-clang-libcpp/devcontainer.json
new file mode 100644
index 0000000..dc69ed4
--- /dev/null
+++ b/.devcontainer/debian-stable-clang-libcpp/devcontainer.json
@@ -0,0 +1,80 @@
+{
+  "name": "R devel (Debian stable, Clang, libc++)",
+  "build": {
+    "dockerfile": "../Debian.Dockerfile",
+    "context": "..",
+    "args": {
+      "BASE_IMAGE": "debian",
+      "BASE_IMAGE_TAG": "stable",
+      "COMPILER": "clang",
+      "CXX_STDLIB": "libc++",
+      "CRAN": "https://cloud.r-project.org",
+      "R_VERSION": "devel",
+      // "NCPUS": "1",
+      "USE_ZSH_FOR_ROOT": "unset-to-use-bash",
+      "SET_LANG": "en_US.UTF-8",
+      "SET_TZ": "Etc/UTC"
+    }
+  },
+
+  "onCreateCommand": "onCreateCommand.sh",
+  "postCreateCommand": "postCreateCommand.sh",
+  "postStartCommand": "postStartCommand.sh",
+
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "configureZshAsDefaultShell": true,
+      "upgradePackages": false,
+      "username": "vscode",
+      "userUid": "automatic",
+      "userGid": "automatic"
+    },
+    // A comma separated list of packages to install
+    "ghcr.io/rocker-org/devcontainer-features/apt-packages:1": {
+      "packages": "qpdf"
+    }
+  },
+
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "DavidAnson.vscode-markdownlint",
+        "eamodio.gitlens@11.7.0",
+        "editorconfig.editorconfig",
+        "GitHub.vscode-pull-request-github",
+        "grapecity.gc-excelviewer",
+        "mhutchie.git-graph",
+        "mutantdino.resourcemonitor",
+        "redhat.vscode-yaml",
+        "REditorSupport.r",
+        "timonwong.shellcheck",
+        "exiasr.hadolint",
+        "ms-vscode.cpptools"
+      ],
+      "settings": {
+        "gitlens.showWelcomeOnInstall": false,
+        "gitlens.showWhatsNewAfterUpgrades": false,
+        "r.bracketedPaste": true,
+        "r.plot.useHttpgd": true,
+        "r.rterm.linux": "/usr/local/bin/radian",
+        "r.rterm.option": [
+          "--no-save",
+          "--no-restore"
+        ],
+        "r.workspaceViewer.showObjectSize": true,
+        "resmon.show.battery": false,
+        "resmon.show.cpufreq": false
+      }
+    }
+  },
+
+  // Set 'remoteUser' to 'root' to connect as root instead.
+  "remoteUser": "vscode",
+
+  "remoteEnv": {
+    // Pip: Install packages to the user site
+    "PIP_USER": "1",
+    // A comma separated list of packages to install
+    "R_PACKAGES": "fontquiver"
+  }
+}
diff --git a/.devcontainer/debian-stable-clang/devcontainer.json b/.devcontainer/debian-stable-clang/devcontainer.json
new file mode 100644
index 0000000..28e09a1
--- /dev/null
+++ b/.devcontainer/debian-stable-clang/devcontainer.json
@@ -0,0 +1,79 @@
+{
+  "name": "R devel (Debian stable, Clang)",
+  "build": {
+    "dockerfile": "../Debian.Dockerfile",
+    "context": "..",
+    "args": {
+      "BASE_IMAGE": "debian",
+      "BASE_IMAGE_TAG": "stable",
+      "COMPILER": "clang",
+      "CRAN": "https://cloud.r-project.org",
+      "R_VERSION": "devel",
+      // "NCPUS": "1",
+      "USE_ZSH_FOR_ROOT": "unset-to-use-bash",
+      "SET_LANG": "en_US.UTF-8",
+      "SET_TZ": "Etc/UTC"
+    }
+  },
+
+  "onCreateCommand": "onCreateCommand.sh",
+  "postCreateCommand": "postCreateCommand.sh",
+  "postStartCommand": "postStartCommand.sh",
+
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "configureZshAsDefaultShell": true,
+      "upgradePackages": false,
+      "username": "vscode",
+      "userUid": "automatic",
+      "userGid": "automatic"
+    },
+    // A comma separated list of packages to install
+    "ghcr.io/rocker-org/devcontainer-features/apt-packages:1": {
+      "packages": "qpdf"
+    }
+  },
+
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "DavidAnson.vscode-markdownlint",
+        "eamodio.gitlens@11.7.0",
+        "editorconfig.editorconfig",
+        "GitHub.vscode-pull-request-github",
+        "grapecity.gc-excelviewer",
+        "mhutchie.git-graph",
+        "mutantdino.resourcemonitor",
+        "redhat.vscode-yaml",
+        "REditorSupport.r",
+        "timonwong.shellcheck",
+        "exiasr.hadolint",
+        "ms-vscode.cpptools"
+      ],
+      "settings": {
+        "gitlens.showWelcomeOnInstall": false,
+        "gitlens.showWhatsNewAfterUpgrades": false,
+        "r.bracketedPaste": true,
+        "r.plot.useHttpgd": true,
+        "r.rterm.linux": "/usr/local/bin/radian",
+        "r.rterm.option": [
+          "--no-save",
+          "--no-restore"
+        ],
+        "r.workspaceViewer.showObjectSize": true,
+        "resmon.show.battery": false,
+        "resmon.show.cpufreq": false
+      }
+    }
+  },
+
+  // Set 'remoteUser' to 'root' to connect as root instead.
+  "remoteUser": "vscode",
+
+  "remoteEnv": {
+    // Pip: Install packages to the user site
+    "PIP_USER": "1",
+    // A comma separated list of packages to install
+    "R_PACKAGES": "fontquiver"
+  }
+}
diff --git a/.devcontainer/debian-stable-gcc/devcontainer.json b/.devcontainer/debian-stable-gcc/devcontainer.json
new file mode 100644
index 0000000..ff22db8
--- /dev/null
+++ b/.devcontainer/debian-stable-gcc/devcontainer.json
@@ -0,0 +1,78 @@
+{
+  "name": "R devel (Debian stable, GCC)",
+  "build": {
+    "dockerfile": "../Debian.Dockerfile",
+    "context": "..",
+    "args": {
+      "BASE_IMAGE": "debian",
+      "BASE_IMAGE_TAG": "stable",
+      "CRAN": "https://cloud.r-project.org",
+      "R_VERSION": "devel",
+      // "NCPUS": "1",
+      "USE_ZSH_FOR_ROOT": "unset-to-use-bash",
+      "SET_LANG": "en_US.UTF-8",
+      "SET_TZ": "Etc/UTC"
+    }
+  },
+
+  "onCreateCommand": "onCreateCommand.sh",
+  "postCreateCommand": "postCreateCommand.sh",
+  "postStartCommand": "postStartCommand.sh",
+
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "configureZshAsDefaultShell": true,
+      "upgradePackages": false,
+      "username": "vscode",
+      "userUid": "automatic",
+      "userGid": "automatic"
+    },
+    // A comma separated list of packages to install
+    "ghcr.io/rocker-org/devcontainer-features/apt-packages:1": {
+      "packages": "qpdf"
+    }
+  },
+
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "DavidAnson.vscode-markdownlint",
+        "eamodio.gitlens@11.7.0",
+        "editorconfig.editorconfig",
+        "GitHub.vscode-pull-request-github",
+        "grapecity.gc-excelviewer",
+        "mhutchie.git-graph",
+        "mutantdino.resourcemonitor",
+        "redhat.vscode-yaml",
+        "REditorSupport.r",
+        "timonwong.shellcheck",
+        "exiasr.hadolint",
+        "ms-vscode.cpptools"
+      ],
+      "settings": {
+        "gitlens.showWelcomeOnInstall": false,
+        "gitlens.showWhatsNewAfterUpgrades": false,
+        "r.bracketedPaste": true,
+        "r.plot.useHttpgd": true,
+        "r.rterm.linux": "/usr/local/bin/radian",
+        "r.rterm.option": [
+          "--no-save",
+          "--no-restore"
+        ],
+        "r.workspaceViewer.showObjectSize": true,
+        "resmon.show.battery": false,
+        "resmon.show.cpufreq": false
+      }
+    }
+  },
+
+  // Set 'remoteUser' to 'root' to connect as root instead.
+  "remoteUser": "vscode",
+
+  "remoteEnv": {
+    // Pip: Install packages to the user site
+    "PIP_USER": "1",
+    // A comma separated list of packages to install
+    "R_PACKAGES": "fontquiver"
+  }
+}
diff --git a/.devcontainer/debian-testing-clang-libcpp/devcontainer.json b/.devcontainer/debian-testing-clang-libcpp/devcontainer.json
new file mode 100644
index 0000000..3019379
--- /dev/null
+++ b/.devcontainer/debian-testing-clang-libcpp/devcontainer.json
@@ -0,0 +1,80 @@
+{
+  "name": "R devel (Debian testing, Clang, libc++)",
+  "build": {
+    "dockerfile": "../Debian.Dockerfile",
+    "context": "..",
+    "args": {
+      "BASE_IMAGE": "debian",
+      "BASE_IMAGE_TAG": "testing",
+      "COMPILER": "clang",
+      "CXX_STDLIB": "libc++",
+      "CRAN": "https://cloud.r-project.org",
+      "R_VERSION": "devel",
+      // "NCPUS": "1",
+      "USE_ZSH_FOR_ROOT": "unset-to-use-bash",
+      "SET_LANG": "en_US.UTF-8",
+      "SET_TZ": "Etc/UTC"
+    }
+  },
+
+  "onCreateCommand": "onCreateCommand.sh",
+  "postCreateCommand": "postCreateCommand.sh",
+  "postStartCommand": "postStartCommand.sh",
+
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "configureZshAsDefaultShell": true,
+      "upgradePackages": false,
+      "username": "vscode",
+      "userUid": "automatic",
+      "userGid": "automatic"
+    },
+    // A comma separated list of packages to install
+    "ghcr.io/rocker-org/devcontainer-features/apt-packages:1": {
+      "packages": "qpdf"
+    }
+  },
+
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "DavidAnson.vscode-markdownlint",
+        "eamodio.gitlens@11.7.0",
+        "editorconfig.editorconfig",
+        "GitHub.vscode-pull-request-github",
+        "grapecity.gc-excelviewer",
+        "mhutchie.git-graph",
+        "mutantdino.resourcemonitor",
+        "redhat.vscode-yaml",
+        "REditorSupport.r",
+        "timonwong.shellcheck",
+        "exiasr.hadolint",
+        "ms-vscode.cpptools"
+      ],
+      "settings": {
+        "gitlens.showWelcomeOnInstall": false,
+        "gitlens.showWhatsNewAfterUpgrades": false,
+        "r.bracketedPaste": true,
+        "r.plot.useHttpgd": true,
+        "r.rterm.linux": "/usr/local/bin/radian",
+        "r.rterm.option": [
+          "--no-save",
+          "--no-restore"
+        ],
+        "r.workspaceViewer.showObjectSize": true,
+        "resmon.show.battery": false,
+        "resmon.show.cpufreq": false
+      }
+    }
+  },
+
+  // Set 'remoteUser' to 'root' to connect as root instead.
+  "remoteUser": "vscode",
+
+  "remoteEnv": {
+    // Pip: Install packages to the user site
+    "PIP_USER": "1",
+    // A comma separated list of packages to install
+    "R_PACKAGES": "fontquiver"
+  }
+}
diff --git a/.devcontainer/debian-testing-clang/devcontainer.json b/.devcontainer/debian-testing-clang/devcontainer.json
new file mode 100644
index 0000000..387e16f
--- /dev/null
+++ b/.devcontainer/debian-testing-clang/devcontainer.json
@@ -0,0 +1,79 @@
+{
+  "name": "R devel (Debian testing, Clang)",
+  "build": {
+    "dockerfile": "../Debian.Dockerfile",
+    "context": "..",
+    "args": {
+      "BASE_IMAGE": "debian",
+      "BASE_IMAGE_TAG": "testing",
+      "COMPILER": "clang",
+      "CRAN": "https://cloud.r-project.org",
+      "R_VERSION": "devel",
+      // "NCPUS": "1",
+      "USE_ZSH_FOR_ROOT": "unset-to-use-bash",
+      "SET_LANG": "en_US.UTF-8",
+      "SET_TZ": "Etc/UTC"
+    }
+  },
+
+  "onCreateCommand": "onCreateCommand.sh",
+  "postCreateCommand": "postCreateCommand.sh",
+  "postStartCommand": "postStartCommand.sh",
+
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "configureZshAsDefaultShell": true,
+      "upgradePackages": false,
+      "username": "vscode",
+      "userUid": "automatic",
+      "userGid": "automatic"
+    },
+    // A comma separated list of packages to install
+    "ghcr.io/rocker-org/devcontainer-features/apt-packages:1": {
+      "packages": "qpdf"
+    }
+  },
+
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "DavidAnson.vscode-markdownlint",
+        "eamodio.gitlens@11.7.0",
+        "editorconfig.editorconfig",
+        "GitHub.vscode-pull-request-github",
+        "grapecity.gc-excelviewer",
+        "mhutchie.git-graph",
+        "mutantdino.resourcemonitor",
+        "redhat.vscode-yaml",
+        "REditorSupport.r",
+        "timonwong.shellcheck",
+        "exiasr.hadolint",
+        "ms-vscode.cpptools"
+      ],
+      "settings": {
+        "gitlens.showWelcomeOnInstall": false,
+        "gitlens.showWhatsNewAfterUpgrades": false,
+        "r.bracketedPaste": true,
+        "r.plot.useHttpgd": true,
+        "r.rterm.linux": "/usr/local/bin/radian",
+        "r.rterm.option": [
+          "--no-save",
+          "--no-restore"
+        ],
+        "r.workspaceViewer.showObjectSize": true,
+        "resmon.show.battery": false,
+        "resmon.show.cpufreq": false
+      }
+    }
+  },
+
+  // Set 'remoteUser' to 'root' to connect as root instead.
+  "remoteUser": "vscode",
+
+  "remoteEnv": {
+    // Pip: Install packages to the user site
+    "PIP_USER": "1",
+    // A comma separated list of packages to install
+    "R_PACKAGES": "fontquiver"
+  }
+}
diff --git a/.devcontainer/debian-testing-gcc/devcontainer.json b/.devcontainer/debian-testing-gcc/devcontainer.json
new file mode 100644
index 0000000..8a93c4e
--- /dev/null
+++ b/.devcontainer/debian-testing-gcc/devcontainer.json
@@ -0,0 +1,78 @@
+{
+  "name": "R devel (Debian testing, GCC)",
+  "build": {
+    "dockerfile": "../Debian.Dockerfile",
+    "context": "..",
+    "args": {
+      "BASE_IMAGE": "debian",
+      "BASE_IMAGE_TAG": "testing",
+      "CRAN": "https://cloud.r-project.org",
+      "R_VERSION": "devel",
+      // "NCPUS": "1",
+      "USE_ZSH_FOR_ROOT": "unset-to-use-bash",
+      "SET_LANG": "en_US.UTF-8",
+      "SET_TZ": "Etc/UTC"
+    }
+  },
+
+  "onCreateCommand": "onCreateCommand.sh",
+  "postCreateCommand": "postCreateCommand.sh",
+  "postStartCommand": "postStartCommand.sh",
+
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "configureZshAsDefaultShell": true,
+      "upgradePackages": false,
+      "username": "vscode",
+      "userUid": "automatic",
+      "userGid": "automatic"
+    },
+    // A comma separated list of packages to install
+    "ghcr.io/rocker-org/devcontainer-features/apt-packages:1": {
+      "packages": "qpdf"
+    }
+  },
+
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "DavidAnson.vscode-markdownlint",
+        "eamodio.gitlens@11.7.0",
+        "editorconfig.editorconfig",
+        "GitHub.vscode-pull-request-github",
+        "grapecity.gc-excelviewer",
+        "mhutchie.git-graph",
+        "mutantdino.resourcemonitor",
+        "redhat.vscode-yaml",
+        "REditorSupport.r",
+        "timonwong.shellcheck",
+        "exiasr.hadolint",
+        "ms-vscode.cpptools"
+      ],
+      "settings": {
+        "gitlens.showWelcomeOnInstall": false,
+        "gitlens.showWhatsNewAfterUpgrades": false,
+        "r.bracketedPaste": true,
+        "r.plot.useHttpgd": true,
+        "r.rterm.linux": "/usr/local/bin/radian",
+        "r.rterm.option": [
+          "--no-save",
+          "--no-restore"
+        ],
+        "r.workspaceViewer.showObjectSize": true,
+        "resmon.show.battery": false,
+        "resmon.show.cpufreq": false
+      }
+    }
+  },
+
+  // Set 'remoteUser' to 'root' to connect as root instead.
+  "remoteUser": "vscode",
+
+  "remoteEnv": {
+    // Pip: Install packages to the user site
+    "PIP_USER": "1",
+    // A comma separated list of packages to install
+    "R_PACKAGES": "fontquiver"
+  }
+}
diff --git a/.devcontainer/debian-unstable-clang-18-libcpp/devcontainer.json b/.devcontainer/debian-unstable-clang-18-libcpp/devcontainer.json
new file mode 100644
index 0000000..3714d55
--- /dev/null
+++ b/.devcontainer/debian-unstable-clang-18-libcpp/devcontainer.json
@@ -0,0 +1,82 @@
+{
+  "name": "R devel (Debian unstable, Clang 18, libc++)",
+  "build": {
+    "dockerfile": "../Debian.Dockerfile",
+    "context": "..",
+    "args": {
+      "BASE_IMAGE": "debian",
+      "BASE_IMAGE_TAG": "unstable",
+      "COMPILER": "clang",
+      "COMPILER_VERSION": "18",
+      "CXX_STDLIB": "libc++",
+      "CRAN": "https://cloud.r-project.org",
+      "R_VERSION": "devel",
+      // "NCPUS": "1",
+      "INSTALL_COMMON_UTILS": "true",
+      "USE_ZSH_FOR_ROOT": "unset-to-use-bash",
+      "SET_LANG": "en_US.UTF-8",
+      "SET_TZ": "Etc/UTC"
+    }
+  },
+
+  "onCreateCommand": "onCreateCommand.sh",
+  "postCreateCommand": "postCreateCommand.sh",
+  "postStartCommand": "postStartCommand.sh",
+
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "configureZshAsDefaultShell": true,
+      "upgradePackages": false,
+      "username": "vscode",
+      "userUid": "automatic",
+      "userGid": "automatic"
+    },
+    // A comma separated list of packages to install
+    "ghcr.io/rocker-org/devcontainer-features/apt-packages:1": {
+      "packages": "qpdf"
+    }
+  },
+
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "DavidAnson.vscode-markdownlint",
+        "eamodio.gitlens@11.7.0",
+        "editorconfig.editorconfig",
+        "GitHub.vscode-pull-request-github",
+        "grapecity.gc-excelviewer",
+        "mhutchie.git-graph",
+        "mutantdino.resourcemonitor",
+        "redhat.vscode-yaml",
+        "REditorSupport.r",
+        "timonwong.shellcheck",
+        "exiasr.hadolint",
+        "ms-vscode.cpptools"
+      ],
+      "settings": {
+        "gitlens.showWelcomeOnInstall": false,
+        "gitlens.showWhatsNewAfterUpgrades": false,
+        "r.bracketedPaste": true,
+        "r.plot.useHttpgd": true,
+        "r.rterm.linux": "/usr/local/bin/radian",
+        "r.rterm.option": [
+          "--no-save",
+          "--no-restore"
+        ],
+        "r.workspaceViewer.showObjectSize": true,
+        "resmon.show.battery": false,
+        "resmon.show.cpufreq": false
+      }
+    }
+  },
+
+  // Set 'remoteUser' to 'root' to connect as root instead.
+  "remoteUser": "vscode",
+
+  "remoteEnv": {
+    // Pip: Install packages to the user site
+    "PIP_USER": "1",
+    // A comma separated list of packages to install
+    "R_PACKAGES": "fontquiver"
+  }
+}
diff --git a/.devcontainer/debian-unstable-clang-18/devcontainer.json b/.devcontainer/debian-unstable-clang-18/devcontainer.json
new file mode 100644
index 0000000..3e0f6a1
--- /dev/null
+++ b/.devcontainer/debian-unstable-clang-18/devcontainer.json
@@ -0,0 +1,81 @@
+{
+  "name": "R devel (Debian unstable, Clang 18)",
+  "build": {
+    "dockerfile": "../Debian.Dockerfile",
+    "context": "..",
+    "args": {
+      "BASE_IMAGE": "debian",
+      "BASE_IMAGE_TAG": "unstable",
+      "COMPILER": "clang",
+      "COMPILER_VERSION": "18",
+      "CRAN": "https://cloud.r-project.org",
+      "R_VERSION": "devel",
+      // "NCPUS": "1",
+      "INSTALL_COMMON_UTILS": "true",
+      "USE_ZSH_FOR_ROOT": "unset-to-use-bash",
+      "SET_LANG": "en_US.UTF-8",
+      "SET_TZ": "Etc/UTC"
+    }
+  },
+
+  "onCreateCommand": "onCreateCommand.sh",
+  "postCreateCommand": "postCreateCommand.sh",
+  "postStartCommand": "postStartCommand.sh",
+
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "configureZshAsDefaultShell": true,
+      "upgradePackages": false,
+      "username": "vscode",
+      "userUid": "automatic",
+      "userGid": "automatic"
+    },
+    // A comma separated list of packages to install
+    "ghcr.io/rocker-org/devcontainer-features/apt-packages:1": {
+      "packages": "qpdf"
+    }
+  },
+
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "DavidAnson.vscode-markdownlint",
+        "eamodio.gitlens@11.7.0",
+        "editorconfig.editorconfig",
+        "GitHub.vscode-pull-request-github",
+        "grapecity.gc-excelviewer",
+        "mhutchie.git-graph",
+        "mutantdino.resourcemonitor",
+        "redhat.vscode-yaml",
+        "REditorSupport.r",
+        "timonwong.shellcheck",
+        "exiasr.hadolint",
+        "ms-vscode.cpptools"
+      ],
+      "settings": {
+        "gitlens.showWelcomeOnInstall": false,
+        "gitlens.showWhatsNewAfterUpgrades": false,
+        "r.bracketedPaste": true,
+        "r.plot.useHttpgd": true,
+        "r.rterm.linux": "/usr/local/bin/radian",
+        "r.rterm.option": [
+          "--no-save",
+          "--no-restore"
+        ],
+        "r.workspaceViewer.showObjectSize": true,
+        "resmon.show.battery": false,
+        "resmon.show.cpufreq": false
+      }
+    }
+  },
+
+  // Set 'remoteUser' to 'root' to connect as root instead.
+  "remoteUser": "vscode",
+
+  "remoteEnv": {
+    // Pip: Install packages to the user site
+    "PIP_USER": "1",
+    // A comma separated list of packages to install
+    "R_PACKAGES": "fontquiver"
+  }
+}
diff --git a/.devcontainer/debian-unstable-clang-libcpp/devcontainer.json b/.devcontainer/debian-unstable-clang-libcpp/devcontainer.json
new file mode 100644
index 0000000..9eb43c4
--- /dev/null
+++ b/.devcontainer/debian-unstable-clang-libcpp/devcontainer.json
@@ -0,0 +1,81 @@
+{
+  "name": "R devel (Debian unstable, Clang, libc++)",
+  "build": {
+    "dockerfile": "../Debian.Dockerfile",
+    "context": "..",
+    "args": {
+      "BASE_IMAGE": "debian",
+      "BASE_IMAGE_TAG": "unstable",
+      "COMPILER": "clang",
+      "CXX_STDLIB": "libc++",
+      "CRAN": "https://cloud.r-project.org",
+      "R_VERSION": "devel",
+      // "NCPUS": "1",
+      "INSTALL_COMMON_UTILS": "true",
+      "USE_ZSH_FOR_ROOT": "unset-to-use-bash",
+      "SET_LANG": "en_US.UTF-8",
+      "SET_TZ": "Etc/UTC"
+    }
+  },
+
+  "onCreateCommand": "onCreateCommand.sh",
+  "postCreateCommand": "postCreateCommand.sh",
+  "postStartCommand": "postStartCommand.sh",
+
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "configureZshAsDefaultShell": true,
+      "upgradePackages": false,
+      "username": "vscode",
+      "userUid": "automatic",
+      "userGid": "automatic"
+    },
+    // A comma separated list of packages to install
+    "ghcr.io/rocker-org/devcontainer-features/apt-packages:1": {
+      "packages": "qpdf"
+    }
+  },
+
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "DavidAnson.vscode-markdownlint",
+        "eamodio.gitlens@11.7.0",
+        "editorconfig.editorconfig",
+        "GitHub.vscode-pull-request-github",
+        "grapecity.gc-excelviewer",
+        "mhutchie.git-graph",
+        "mutantdino.resourcemonitor",
+        "redhat.vscode-yaml",
+        "REditorSupport.r",
+        "timonwong.shellcheck",
+        "exiasr.hadolint",
+        "ms-vscode.cpptools"
+      ],
+      "settings": {
+        "gitlens.showWelcomeOnInstall": false,
+        "gitlens.showWhatsNewAfterUpgrades": false,
+        "r.bracketedPaste": true,
+        "r.plot.useHttpgd": true,
+        "r.rterm.linux": "/usr/local/bin/radian",
+        "r.rterm.option": [
+          "--no-save",
+          "--no-restore"
+        ],
+        "r.workspaceViewer.showObjectSize": true,
+        "resmon.show.battery": false,
+        "resmon.show.cpufreq": false
+      }
+    }
+  },
+
+  // Set 'remoteUser' to 'root' to connect as root instead.
+  "remoteUser": "vscode",
+
+  "remoteEnv": {
+    // Pip: Install packages to the user site
+    "PIP_USER": "1",
+    // A comma separated list of packages to install
+    "R_PACKAGES": "fontquiver"
+  }
+}
diff --git a/.devcontainer/debian-unstable-clang/devcontainer.json b/.devcontainer/debian-unstable-clang/devcontainer.json
new file mode 100644
index 0000000..62e72c3
--- /dev/null
+++ b/.devcontainer/debian-unstable-clang/devcontainer.json
@@ -0,0 +1,80 @@
+{
+  "name": "R devel (Debian unstable, Clang)",
+  "build": {
+    "dockerfile": "../Debian.Dockerfile",
+    "context": "..",
+    "args": {
+      "BASE_IMAGE": "debian",
+      "BASE_IMAGE_TAG": "unstable",
+      "COMPILER": "clang",
+      "CRAN": "https://cloud.r-project.org",
+      "R_VERSION": "devel",
+      // "NCPUS": "1",
+      "INSTALL_COMMON_UTILS": "true",
+      "USE_ZSH_FOR_ROOT": "unset-to-use-bash",
+      "SET_LANG": "en_US.UTF-8",
+      "SET_TZ": "Etc/UTC"
+    }
+  },
+
+  "onCreateCommand": "onCreateCommand.sh",
+  "postCreateCommand": "postCreateCommand.sh",
+  "postStartCommand": "postStartCommand.sh",
+
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "configureZshAsDefaultShell": true,
+      "upgradePackages": false,
+      "username": "vscode",
+      "userUid": "automatic",
+      "userGid": "automatic"
+    },
+    // A comma separated list of packages to install
+    "ghcr.io/rocker-org/devcontainer-features/apt-packages:1": {
+      "packages": "qpdf"
+    }
+  },
+
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "DavidAnson.vscode-markdownlint",
+        "eamodio.gitlens@11.7.0",
+        "editorconfig.editorconfig",
+        "GitHub.vscode-pull-request-github",
+        "grapecity.gc-excelviewer",
+        "mhutchie.git-graph",
+        "mutantdino.resourcemonitor",
+        "redhat.vscode-yaml",
+        "REditorSupport.r",
+        "timonwong.shellcheck",
+        "exiasr.hadolint",
+        "ms-vscode.cpptools"
+      ],
+      "settings": {
+        "gitlens.showWelcomeOnInstall": false,
+        "gitlens.showWhatsNewAfterUpgrades": false,
+        "r.bracketedPaste": true,
+        "r.plot.useHttpgd": true,
+        "r.rterm.linux": "/usr/local/bin/radian",
+        "r.rterm.option": [
+          "--no-save",
+          "--no-restore"
+        ],
+        "r.workspaceViewer.showObjectSize": true,
+        "resmon.show.battery": false,
+        "resmon.show.cpufreq": false
+      }
+    }
+  },
+
+  // Set 'remoteUser' to 'root' to connect as root instead.
+  "remoteUser": "vscode",
+
+  "remoteEnv": {
+    // Pip: Install packages to the user site
+    "PIP_USER": "1",
+    // A comma separated list of packages to install
+    "R_PACKAGES": "fontquiver"
+  }
+}
diff --git a/.devcontainer/debian-unstable-gcc/devcontainer.json b/.devcontainer/debian-unstable-gcc/devcontainer.json
new file mode 100644
index 0000000..e17828d
--- /dev/null
+++ b/.devcontainer/debian-unstable-gcc/devcontainer.json
@@ -0,0 +1,79 @@
+{
+  "name": "R devel (Debian unstable, GCC)",
+  "build": {
+    "dockerfile": "../Debian.Dockerfile",
+    "context": "..",
+    "args": {
+      "BASE_IMAGE": "debian",
+      "BASE_IMAGE_TAG": "unstable",
+      "CRAN": "https://cloud.r-project.org",
+      "R_VERSION": "devel",
+      // "NCPUS": "1",
+      "INSTALL_COMMON_UTILS": "true",
+      "USE_ZSH_FOR_ROOT": "unset-to-use-bash",
+      "SET_LANG": "en_US.UTF-8",
+      "SET_TZ": "Etc/UTC"
+    }
+  },
+
+  "onCreateCommand": "onCreateCommand.sh",
+  "postCreateCommand": "postCreateCommand.sh",
+  "postStartCommand": "postStartCommand.sh",
+
+  "features": {
+    "ghcr.io/devcontainers/features/common-utils:2": {
+      "configureZshAsDefaultShell": true,
+      "upgradePackages": false,
+      "username": "vscode",
+      "userUid": "automatic",
+      "userGid": "automatic"
+    },
+    // A comma separated list of packages to install
+    "ghcr.io/rocker-org/devcontainer-features/apt-packages:1": {
+      "packages": "qpdf"
+    }
+  },
+
+  "customizations": {
+    "vscode": {
+      "extensions": [
+        "DavidAnson.vscode-markdownlint",
+        "eamodio.gitlens@11.7.0",
+        "editorconfig.editorconfig",
+        "GitHub.vscode-pull-request-github",
+        "grapecity.gc-excelviewer",
+        "mhutchie.git-graph",
+        "mutantdino.resourcemonitor",
+        "redhat.vscode-yaml",
+        "REditorSupport.r",
+        "timonwong.shellcheck",
+        "exiasr.hadolint",
+        "ms-vscode.cpptools"
+      ],
+      "settings": {
+        "gitlens.showWelcomeOnInstall": false,
+        "gitlens.showWhatsNewAfterUpgrades": false,
+        "r.bracketedPaste": true,
+        "r.plot.useHttpgd": true,
+        "r.rterm.linux": "/usr/local/bin/radian",
+        "r.rterm.option": [
+          "--no-save",
+          "--no-restore"
+        ],
+        "r.workspaceViewer.showObjectSize": true,
+        "resmon.show.battery": false,
+        "resmon.show.cpufreq": false
+      }
+    }
+  },
+
+  // Set 'remoteUser' to 'root' to connect as root instead.
+  "remoteUser": "vscode",
+
+  "remoteEnv": {
+    // Pip: Install packages to the user site
+    "PIP_USER": "1",
+    // A comma separated list of packages to install
+    "R_PACKAGES": "fontquiver"
+  }
+}