anchor.diff:  RUN mkdir -p /app/src
   ADD src/package* /app/src/
   WORKDIR /app/src
  +VOLUME /app/src/node_modules
   RUN npm install
   
   # }}}
  
positive.code: 
  ADD Gemfile* /app/
  
  RUN gem install --update bundler execjs && \
      bundle install --deployment
  
  ADD . /app
  COPY --from=node-builder /app/src/node_modules ./src/node_modules
  
  RUN ["bundle", "exec", "jekyll", "build", "--verbose", "--trace"]
  
  RUN rm -rvf /app/src/node_modules/
  
  
negative.code: # {{{
  FROM nginx:stable-alpine
  
  COPY --from=jekyll-builder /app/_deploy /usr/share/nginx/html
  
  RUN ["nginx"]
  # }}}
  