anchor.diff:      apk upgrade && \
       apk add $BUILD_PACKAGES && \
       apk add $RUBY_PACKAGES && \
  +    apk add $REDIS_PACKAGES && \
       rm -rf /var/cache/apk/*
   
   RUN mkdir /usr/faexport
  
positive.code: 
  EXPOSE 9292/tcp
  
  CMD bundle exec rackup config.ru -p 9292 --host 0.0.0.0
  
negative.code: 
  ENV BUILD_PACKAGES bash curl-dev ruby-dev build-base
  ENV RUBY_PACKAGES ruby ruby-dev ruby-bigdecimal ruby-json ruby-io-console ruby-bundler
  ENV REDIS_PACKAGES redis
  
  # Update and install all of the required packages.
  # At the end, remove the apk cache
  