anchor.diff:      # echo ". ~/.config/fish/nvm-wrapper/nvm.fish" >> ~/.config/fish/config.fish
   
   # npm
  -ENV NODE_VERSION 11.6.0
  +ENV NODE_VERSION 12.4.0
   RUN cp -f ~/.nvm/nvm.sh ~/.nvm/nvm-tmp.sh && \
       echo "nvm install v$NODE_VERSION" >> ~/.nvm/nvm-tmp.sh && \
  -    echo "nvm alias 10 $NODE_VERSION" >> ~/.nvm/nvm-tmp.sh && \
  -    echo "nvm alias default 10" >> ~/.nvm/nvm-tmp.sh && \
  +    echo "nvm alias 12 $NODE_VERSION" >> ~/.nvm/nvm-tmp.sh && \
  +    echo "nvm alias default 12" >> ~/.nvm/nvm-tmp.sh && \
       echo "nvm use default" >> ~/.nvm/nvm-tmp.sh && \
       sh ~/.nvm/nvm-tmp.sh && \
       rm ~/.nvm/nvm-tmp.sh && \
  
positive.code: 
  # RUN /bin/bash -lc 'yarn global add json-server'
  # RUN /bin/bash -lc 'yarn global add now'
  
negative.code: RUN apt-fast update && apt-fast install --no-install-recommends -y yarn
  
  RUN \
      apt-fast autoremove -y && \
      apt-fast autoclean && \
      rm -rf /var/lib/apt/lists/*
  
  RUN /bin/bash -lc 'npm install -g yarn'
  
  