WiP

.github/docker/monkey-github-builder-clang/Dockerfile

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+FROM debian:bullseye
+
+RUN \
+    sed -n -e 's/^deb /deb-src /p' /etc/apt/sources.list >/etc/apt/sources.list.d/quick-lint-js-sources.list && \
+    apt-get update && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
+    build-essential \
+    ca-certificates \
+    clang-13 \
+    cmake \
+    git \
+    libc++-13-dev \
+    libc++abi-13-dev \
+    libc6-dev \
+    libstdc++-10-dev \
+    ninja-build \
+    python3
+
+RUN rm -rf /var/lib/apt/lists/*

.github/docker/monkey-github-builder-void-linux-musl-clang/Dockerfile

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+FROM ghcr.io/void-linux/void-musl
+RUN xbps-install -Syu || xbps-install -yu xbps \
+    && xbps-install -yu \
+    && xbps-install -y bash git cmake clang python3-codespell ninja \
+    && xbps-remove -Oy
+
+

.github/docker/monkey-github-builder-void-linux-musl-clang/README.md

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+# monkey-github-builder-void-linux-musl-clang Docker image
+
+## Updating the Docker image
+
+Pick a version number for the new Docker image (e.g. `v2`), then run the
+following commands:
+
+    $ docker build --tag ghcr.io/hrzlgnm/monkey-github-builder-void-linux-musl-clang:VERSION_NUMBER_HERE .github/docker/monkey-github-builder-void-linux-musl-clang/
+    $ docker login ghcr.io -u YOUR_GITHUB_USER_NAME_HERE
+    $ docker push ghcr.io/hrzlgnm/monkey-github-builder-void-linux-musl-clang:VERSION_NUMBER_HERE
+
+Then, change the container tag in each workflow file in the .github/workflows/
+directory to refer to your new version.