anchor.diff:    useradd jhipster -s /bin/bash -m -g jhipster -G sudo && \
     echo 'jhipster:jhipster' |chpasswd && \
     mkdir /home/jhipster/app && \
  -  # install open-jdk 8 using SDKMAN
  -  curl -s get.sdkman.io | bash && \
  -  echo sdkman_auto_answer=true > ~/.sdkman/etc/config && \
  -  source "$HOME/.sdkman/bin/sdkman-init.sh" && \
  -  sdk install java 11.0.2-open && \
  +  apt-get update && \
     # install utilities
     apt-get install -y \
       wget \
  
positive.code: 
  # expose the working directory, the Tomcat port, the BrowserSync ports
  USER jhipster
  ENV PATH $PATH:/usr/bin:/home/jhipster/.yarn-global/bin:/home/jhipster/.yarn/bin:/home/jhipster/.config/yarn/global/node_modules/.bin
  WORKDIR "/home/jhipster/app"
  VOLUME ["/home/jhipster/app"]
  
negative.code:     python \
      g++ \
      libpng-dev \
      build-essential \
      sudo && \
    # install node.js
    wget https://nodejs.org/dist/v10.15.3/node-v10.15.3-linux-x64.tar.gz -O /tmp/node.tar.gz && \
    tar -C /usr/local --strip-components 1 -xzf /tmp/node.tar.gz && \
  