anchor.diff:  # Install nodejs
   RUN curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash -
   RUN sudo DEBIAN_FRONTEND=noninteractive apt-get install -yq nodejs \
  - && apt-get clean \
  - && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
  +    && apt-get clean \
  +    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
   
   # Install yarn (replaces npm)
   RUN curl -sL https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
   RUN echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
   RUN apt-get update -q \
  - && sudo DEBIAN_FRONTEND=noninteractive apt-get install -yq yarn \
  - && apt-get clean \
  - && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
  +    && sudo DEBIAN_FRONTEND=noninteractive apt-get install -yq yarn \
  +    && apt-get clean \
  +    && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
   
   #COPY phantom /opt/mean.js/node_modules
   
   # Install MEAN.JS Prerequisites
  +RUN npm install -g bower-npm-resolver
   RUN yarn global add gulp bower yo mocha karma-cli gulp-if bower-npm-resolver --silent \
  - && yarn cache clean
  -
  -RUN npm install -g bower-npm-resolver
  +    && yarn cache clean
   
   RUN mkdir -p /opt/mean.js/public/lib
   WORKDIR /opt/mean.js
  
positive.code: 
  # Install Utilities
  RUN apt-get update -q  \
   && apt-get install -yqq \
   apt-utils \
   curl \
   wget \
   aptitude \
   htop \
   vim \
   git \
   traceroute \
   dnsutils \
   ssh \
   tree \
   tcpdump \
   nano \
   psmisc \
   gcc \
   make \
   build-essential \
   libfreetype6 \
   libfontconfig \
   libkrb5-dev \
   ruby \
   sudo \
   && apt-get clean \
   && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
  
  # Install dumb-init
  RUN wget https://github.com/Yelp/dumb-init/releases/download/v1.2.0/dumb-init_1.2.0_amd64.deb
  
negative.code: 
  # Install node_modules with yarn
  RUN yarn install --non-interactive --pure-lockfile \
      && yarn cache clean
  
  #RUN npm install --quiet && npm cache clean
  #RUN npm install && npm cache verify
  