Dockerfile

FROM public.ecr.aws/docker/library/ruby:3.2-alpine AS build-env

ARG APP_ROOT="/app"
ENV BUNDLE_APP_CONFIG="/app/.bundle"

RUN apk update && \
    apk upgrade && \
    apk add --update --no-cache build-base gcompat git postgresql-dev nodejs yarn && \
    gem install bundler

RUN mkdir -p $APP_ROOT
WORKDIR $APP_ROOT

COPY Gemfile Gemfile.lock package.json yarn.lock $APP_ROOT/

RUN bundle config --local deployment true && \
    bundle config --local force_ruby_platform true \
    bundle config --local path "vendor/bundle" && \
    bundle config --local without 'development test'

RUN bundle install --jobs 20 --retry 5
RUN yarn install --frozen-lockfile
COPY . .
RUN bundle exec rails assets:precompile
RUN mkdir -p tmp/pids
RUN rm -rf vendor/bundle/ruby/*/cache/ && find vendor/ -name "*.o" -delete && find vendor/ -name "*.c"

FROM public.ecr.aws/docker/library/ruby:3.2-alpine

ARG APP_ROOT="/app"
ENV BUNDLE_APP_CONFIG="/app/.bundle"

WORKDIR $APP_ROOT

RUN apk update && \
    apk upgrade && \
    apk add --update --no-cache build-base gcompat postgresql-dev && \
    gem install bundler

COPY --from=build-env $APP_ROOT $APP_ROOT

EXPOSE 3000
CMD ["bundle", "exec", "puma", "-C", "config/puma.rb"]