FROM ruby:2.4 ADD ./ /rack-sequel WORKDIR /rack-sequel RUN bundle install --jobs=4 --gemfile=/rack-sequel/Gemfile --path=/rack-sequel/rack-sequel/bundle ENV DBTYPE=postgresql EXPOSE 8080 CMD bundle exec unicorn -c config/mri_unicorn.rb -o 0.0.0.0 -p 8080 -E production