anchor.diff:  ENV RAILS_SERVE_STATIC_FILES true
   ENV RAILS_LOG_TO_STDOUT true
   
  -RUN curl -sL https://deb.nodesource.com/setup_8.x | bash -
  +RUN curl -sL https://deb.nodesource.com/setup_10.x | bash -
   RUN apt-get install -y nodejs
   
   COPY --from=build /usr/src/build .
  
positive.code: FROM ruby:2.4.2 as build
  
  RUN mkdir -p /usr/src/build
  WORKDIR /usr/src/build
  
negative.code: RUN bundle exec rake assets:precompile
  RUN rm -rf node_modules
  
  FROM ruby:2.5.1
  
  RUN mkdir -p /usr/src/app
  WORKDIR /usr/src/app
  