anchor.diff: -FROM ubuntu:cosmic
  +FROM ubuntu:bionic
   
   RUN \
     # configure the "jhipster" user
  
positive.code:   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 && \
    # install utilities
    apt-get install -y \
      wget \
  
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 && \
  