ARG RUBY_VERSION="3.4.3"
FROM docker.io/library/ruby:${RUBY_VERSION}-slim-bookworm AS base

WORKDIR /kubernaut

RUN <<EOT
  apt-get update -qq
  rm -rf /var/lib/apt/lists /var/cache/apt/archives
  gem update --system --no-document
  gem install -N bundler
EOT

ENV RACK_ENV="production" \
  BUNDLE_DEPLOYMENT=true \
  BUNDLE_PATH="/usr/local/bundle" \
  BUNDLE_WITHOUT="development test"

FROM base AS build

RUN <<EOT
  apt-get update -qq
  apt-get install --yes --no-install-recommends gcc make libc-dev
  rm -rf /var/lib/apt/lists /var/cache/apt/archives
EOT

COPY Gemfile Gemfile.lock ./

RUN <<EOT
  bundle install
  rm -rf ~/.bundle/ "${BUNDLE_PATH}"/ruby/*/cache "${BUNDLE_PATH}"/ruby/*/bundler/gems/*/.git
EOT

COPY . .

FROM base

ENV PORT=4567

RUN <<EOT
  groupadd --system --gid 666 kubernaut
  useradd --system --uid 666 --gid kubernaut --create-home --shell /bin/bash kubernaut
EOT

COPY --from=build "${BUNDLE_PATH}" "${BUNDLE_PATH}"
COPY --from=build /kubernaut /kubernaut

USER kubernaut:kubernaut

EXPOSE $PORT
ENTRYPOINT [ "/kubernaut/dockerfiles/entrypoint.sh" ]
CMD [ "bundle", "exec", "puma" ]