Dockerfile

ARG RUBY_VERSION=3.3

################################################################################
############################## BASE IMAGE ######################################
################################################################################
FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base

# Rails app lives here
WORKDIR /rails

RUN apt-get update -qq && \
  apt-get install --no-install-recommends -y \
  curl \
  libsqlite3-0 \
  postgresql-client \
  default-mysql-client \
  libvips \
  libc6 \
  libjemalloc-dev \
  ffmpeg \
  exiftool \
  && \
  rm -rf /var/lib/apt/lists /var/cache/apt/archives

# Disable documentation for Ruby gems
RUN echo 'gem: --no-rdoc --no-ri' > /etc/gemrc

# Install bundler
# https://bundler.io/v1.16/guides/bundler_docker_guide.html
#
# A version needs to be specified because the base Ruby image explicetly
# specifies the BUNDLER_VERSION variable, therefore, to use more up-to-date
# versions we need to specify them explicitly
ENV BUNDLE_PATH="/usr/local/bundle"

# Set the entrypoint
COPY ./bin/docker-entrypoint /usr/local/bin/entrypoint
RUN chmod +x /usr/local/bin/entrypoint
ENTRYPOINT ["/usr/local/bin/entrypoint"]

###################
### DEVELOPMENT ###
###################

FROM base AS development

# Install packages needed to build gems and node modules
RUN apt-get update -qq && \
  apt-get install --no-install-recommends -y \
  build-essential \
  git \
  pkg-config \
  libpq-dev \
  default-libmysqlclient-dev \
  libvips \
  node-gyp \
  python-is-python3 \
  less \
  freerdp2-shadow-x11 \
  fonts-dejavu \
  fonts-droid-fallback \
  fonts-freefont-ttf \
  fonts-liberation2 \
  groff \
  xvfb \
  fontconfig \
  dbus \
  firefox-esr \
  chromium \
  xauth \
  vim

CMD /bin/bash -c "while true; do sleep 10; done;"

###################
### BUILD IMAGE ###
###################

FROM development AS build

# Install application gems
COPY Gemfile Gemfile.lock ./
RUN bundle install && \
  rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git && \
  bundle exec bootsnap precompile --gemfile

COPY . .

RUN bundle exec bootsnap precompile app/ lib/

RUN SECRET_KEY_BASE_DUMMY=1 ./bin/rails assets:precompile

########################
### PRODUCTION IMAGE ###
########################

FROM base AS production

# Set production environment
ENV RAILS_ENV="production" \
  BUNDLE_DEPLOYMENT="1" \
  BUNDLE_PATH="/usr/local/bundle" \
  BUNDLE_WITHOUT="development"

# Copy built artifacts: gems, application
COPY --from=build /usr/local/bundle /usr/local/bundle
COPY --from=build /rails /rails

RUN useradd rails --home /rails --shell /bin/bash && \
  chown -R rails:rails db log storage tmp
USER rails:rails

EXPOSE 80
CMD ["bundle", "exec", "thrust", "bin/rails", "server"]