Dockerfile.prod

###############################################################################
# Stage 1: Build
FROM ruby:3.0.0 as builder

# Install base packages
RUN apt-get update -qq && \
    apt-get install -y \
    build-essential \
    vim \
    nano \
    postgresql-client && \
    rm -rf /var/lib/apt/lists


# Set env variables
ENV BUNDLER_VERSION 2.2.3
ENV BUNDLE_JOBS 8
ENV BUNDLE_RETRY 5
ENV BUNDLE_WITHOUT development:test
ENV BUNDLE_CACHE_ALL true
ENV RAILS_ROOT /app
ENV RAILS_ENV production
ENV RACK_ENV production

# Set working directory
WORKDIR $RAILS_ROOT

# Install gems
COPY Gemfile Gemfile.lock ./
RUN gem install bundler -v $BUNDLER_VERSION --no-document
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

# Copy app files
COPY . .

# Precompile assets
# SECRET_KEY_BASE=`bin/rake secret` is added here as a workaround for
# https://github.com/rails/rails/issues/32947
RUN SECRET_KEY_BASE=`bin/rake secret` rails assets:precompile --trace && \
    rm -rf tmp/cache vendor/assets test

###############################################################################
# Stage 2: Run
FROM ruby:3.0.0

ENV RAILS_ENV production
ENV RAILS_SERVE_STATIC_FILES true
ENV RAILS_ROOT /app

EXPOSE 3000

RUN mkdir -p $RAILS_ROOT
WORKDIR $RAILS_ROOT

# Copy necessary data at runtime
COPY --from=builder /usr/lib /usr/lib

# Copy gems
COPY --from=builder /usr/local/bundle /usr/local/bundle

# Copy app files
COPY --from=builder $RAILS_ROOT $RAILS_ROOT

# Default entrypoint (overriden if used with this project's docker-compose)
ENTRYPOINT ["sh", "/app/docker-entrypoint.sh"]

# Default command (overriden if used with this project's docker-compose)
CMD ["rails", "server", "-b", "0.0.0.0"]