anchor.diff:  
   MAINTAINER FooTearth "footearth@gmail.com"
   
  -ENV NODE_VERSION 4.2.1
  +ENV NODE_VERSION 5.0.0
   
   WORKDIR /root
   
  
positive.code:   # npm
    cp -f ~/.nvm/nvm.sh ~/.nvm/nvm-tmp.sh && \
    echo "nvm install $NODE_VERSION" >> ~/.nvm/nvm-tmp.sh && \
    echo "nvm alias 4 $NODE_VERSION" >> ~/.nvm/nvm-tmp.sh && \
    echo "nvm alias default 4" >> ~/.nvm/nvm-tmp.sh && \
    echo "nvm use default" >> ~/.nvm/nvm-tmp.sh && \
    sh ~/.nvm/nvm-tmp.sh && \
    rm ~/.nvm/nvm-tmp.sh && \
  
negative.code: RUN \
  
    # global package
    /bin/bash -l -c 'npm install -g cnpm --registry=https://registry.npm.taobao.org' && \
    /bin/bash -l -c 'cnpm install -g \
      coffee-script http-server supervisor nodemon forever pm2'
  