Dockerfile.build

FROM ruby:2.5.8-alpine AS build-env

ARG RAILS_ROOT=/app
ARG BUILD_PACKAGES="build-base curl-dev git"
ARG DEV_PACKAGES="postgresql-dev yaml-dev zlib-dev nodejs yarn"
ARG RUBY_PACKAGES="tzdata"
ENV RAILS_ENV=production
ENV NODE_ENV=production
ENV BUNDLE_APP_CONFIG="$RAILS_ROOT/.bundle"
ENV RAILS_SERVE_STATIC_FILES true
ENV RAILS_LOG_TO_STDOUT true

WORKDIR $RAILS_ROOT
# install packages
RUN apk update \
    && apk upgrade \
    && apk add --update --no-cache $BUILD_PACKAGES $DEV_PACKAGES $RUBY_PACKAGES

COPY Gemfile* ./
# install rubygem
COPY Gemfile Gemfile.lock $RAILS_ROOT/
RUN gem update --system 3.2.3 && gem install bundler -i 2.2.3 && bundle config set --local without 'development test' && bundle config set --local path 'vendor/bundle'
RUN bundle install \
    && rm -rf vendor/bundle/ruby/2.5.0/cache/*.gem \
    && find vendor/bundle/ruby/2.5.0/gems/ -name "*.c" -delete \
    && find vendor/bundle/ruby/2.5.0/gems/ -name "*.o" -delete
COPY . .
RUN DATABASE_URL=nulldb:://null SECRET_KEY_BASE=1 RAILS_ENV=production bundle exec rake assets:precompile --trace
# Remove folders not needed in resulting image
RUN rm -rf node_modules tmp/cache app/assets vendor/assets spec


FROM ruby:2.5.8-alpine
ARG RAILS_ROOT=/app
ARG PACKAGES="tzdata postgresql-client nodejs bash curl-dev"
ENV RAILS_ENV=production
ENV BUNDLE_APP_CONFIG="$RAILS_ROOT/.bundle"
RUN gem update --system 3.2.3 && gem install bundler -i 2.2.3
WORKDIR $RAILS_ROOT
# install packages
RUN apk update \
    && apk upgrade \
    && apk add --update --no-cache $PACKAGES
COPY --from=build-env $RAILS_ROOT $RAILS_ROOT
EXPOSE 3000
CMD ["bundle", "exec", "rails", "server", "-b", "0.0.0.0"]