medium-multi-stage-dockerfile-full-classic-dockerfile

Dockerfile

FROM ruby:2.5.1-alpine3.7

WORKDIR /home/app

RUN apk add --update --no-cache \
   build-base \
   libxml2-dev \
   libxslt-dev \
   nodejs \
   tzdata
   
COPY Gemfile* /home/app/

RUN bundle config build.nokogiri --use-system-libraries \
 && bundle install --deployment --without development test --jobs 4 --retry 3
 
COPY . /home/app

ARG ASSET_HOST
ARG ENV=production

RUN ASSET_HOST=$ASSET_HOST \
    RAILS_ENV=$ENV \
    bundle exec rake assets:precompile
    
ENV PORT 3000

EXPOSE 3000
ENTRYPOINT ["bundle", "exec"]

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