anchor.diff:      apt-get -y purge --auto-remove build-essential automake python && \
       rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
   
  +ENV NODE_ENV production
   CMD ["node", "/app/server/index"]
  
positive.code: 
  COPY . /app
  WORKDIR "/app"
  ENV NODE_ENV production
  
  RUN cd /app/ && \
      # remove dev stuff
  
negative.code:     # build
      apt-get update -y && \
      apt install -y libssl-dev build-essential automake python libcurl3-dev && \
      npm install && \
      npm run build && \
      # prepare for production
  