Dockerfile

FROM ruby:3.0.3-alpine3.13 AS builder

# Minimal requirements to run a Rails app
RUN apk add --no-cache --update build-base \
  linux-headers \
  git \
  postgresql-dev=~13 \
  # Rails SQL schema format requires `pg_dump(1)` and `psql(1)`
  postgresql=~13 \
  # Install same version of pg_dump
  postgresql-client=~13 \
  nodejs \
  yarn \
  # Needed for nodejs / node-gyp
  python2 \
  tzdata \
  imagemagick
  
ENV BUNDLER_VERSION 2.2.24
ENV BUNDLE_JOBS 8
ENV BUNDLE_RETRY 5
ENV BUNDLE_WITHOUT development:test
ENV BUNDLE_CACHE_ALL true
ENV RAILS_ENV production
ENV RACK_ENV production
ENV NODE_ENV production
ENV APP_PATH /work

WORKDIR $APP_PATH

# Gems installation
COPY Gemfile Gemfile.lock ./
RUN gem install bundler -v $BUNDLER_VERSION

RUN bundle config --global frozen 1 && \
  bundle install && \
  rm -rf /usr/local/bundle/cache/*.gem && \
  find /usr/local/bundle/gems/ -name "*.c" -delete && \
  find /usr/local/bundle/gems/ -name "*.o" -delete


# NPM packages installation
COPY package.json yarn.lock ./
RUN yarn install --frozen-lockfile --non-interactive --production

ADD . $APP_PATH

# RUN bin/rails stimulus:manifest:update
RUN SECRET_KEY_BASE=`bin/rake secret` rails assets:clobber assets:precompile --trace && \
  yarn cache clean && \
  rm -rf node_modules tmp/cache vendor/assets test

  
FROM ruby:3.0.3-alpine3.13

RUN mkdir -p /work
WORKDIR /work

ENV RAILS_ENV production
ENV NODE_ENV production
ENV RAILS_SERVE_STATIC_FILES true

# Some native extensions required by gems such as pg or mysql2.
COPY --from=builder /usr/lib /usr/lib

# Timezone data is required at runtime
COPY --from=builder /usr/share/zoneinfo/ /usr/share/zoneinfo/

# Ruby gems
COPY --from=builder /usr/local/bundle /usr/local/bundle
COPY --from=builder /work /work

RUN apk add --no-cache --update imagemagick

# COPY docker-entrypoint.sh ./
# ENTRYPOINT ["./docker-entrypoint.sh"]

EXPOSE 3000

CMD ["bundle", "exec", "puma", "-C", "config/puma.rb"]