# syntax=docker/dockerfile:1.4 # Fast app image — gems come from deps base (custom/dena-deps:1). # Rebuild deps when Gemfile.lock changes: docker build -f Dockerfile.deps -t custom/dena-deps:1 . ARG DEPS_IMAGE=custom/dena-deps:1 FROM ${DEPS_IMAGE} AS base ARG RAILS_ENV=production ENV RAILS_ENV=${RAILS_ENV} \ APP_HOME=/home/app USER app WORKDIR $APP_HOME COPY --chown=app:app . . RUN echo "# This file was overridden by default during docker image build." > Gemfile.plugin \ && ruby ./bin/init_config \ && chmod +x ./bin/logger \ && bundle exec rake tmp:create EXPOSE 3000 CMD ["bundle", "exec", "puma", "--config", "config/puma.rb"] FROM base COPY --chown=app:app Gemfile.plugin Gemfile.lock $APP_HOME/ RUN bundle install --path /opt/vendor/bundle --jobs $(nproc)