anchor.diff:  
   # 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/*
  +    && 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
  
positive.code: # 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/*
  
  # 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/*
  
  #COPY phantom /opt/mean.js/node_modules
  
  # Install MEAN.JS Prerequisites
  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
  
  RUN mkdir -p /opt/mean.js/public/lib
  WORKDIR /opt/mean.js
  
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
  