Dockerfile

ARG RUBY_VERSION
FROM ruby:$RUBY_VERSION

ENV LANG C.UTF-8

ARG PG_VERSION
ARG NODE_MAJOR
ARG BUNDLER_VERSION
ARG YARN_VERSION

RUN apt-get update -qq && apt-get install -y build-essential software-properties-common

# Node.js
RUN curl -sL https://deb.nodesource.com/setup_10.x | bash - \
    && apt-get install -y nodejs

# Yarn
RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -\
    && echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list \
    && apt-get update \
    && apt-get install -y yarn

# Add PostgreSQL to sources list
RUN echo "deb http://apt.postgresql.org/pub/repos/apt/ trusty-pgdg main" |  tee /etc/apt/sources.list.d/pgdg.list \
    && wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc |  apt-key add - \
    && apt-get update \
    && apt-get install postgresql-client-${PG_VERSION} -yq

# Heroku
RUN curl https://cli-assets.heroku.com/install.sh | sh

# Install dependencies in Aptfile
COPY Aptfile /tmp/Aptfile
RUN DEBIAN_FRONTEND=noninteractive apt-get -yq dist-upgrade && \
  DEBIAN_FRONTEND=noninteractive apt-get install -yq --no-install-recommends \
    $(cat /tmp/Aptfile | xargs) && \
    apt-get clean && \
    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* && \
    truncate -s 0 /var/log/*log

# Configure bundler
ENV LANG=C.UTF-8 \
  BUNDLE_JOBS=4 \
  BUNDLE_RETRY=3 \
  BUNDLE_APP_CONFIG=.bundle


# Upgrade RubyGems and install required Bundler version 
RUN gem update --system && \
    gem install bundler:$BUNDLER_VERSION --conservative

# Run binstubs without prefixing with `bin/` or `bundle exec`
ENV PATH /app/bin:$PATH

# Create a directory for the app code
RUN mkdir -p /app

WORKDIR /app