anchor.diff:  MAINTAINER ductamnguyen@anduintransact.com
   
   RUN groupadd -r anduin && useradd -g anduin anduin
  +
  +# Yarn
  +RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add - && \
  +echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
   
   # Nodejs
   ENV NODE_VERSION v6.10.0
  
positive.code:     && cd /tmp/phantomjs \
      && mv bin/phantomjs /usr/local/bin
  
  # Clean up APT when done.
  RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
  
  ENV MJML_VERSION 3.3.3
  RUN npm install -g mjml@${MJML_VERSION}
  
negative.code:     ln -s /usr/local/bin/node /usr/local/bin/nodejs
  
  # Ruby
  RUN apt-get install -y curl yarn patch gawk g++ gcc make libc6-dev patch libreadline6-dev zlib1g-dev libssl-dev libyaml-dev libsqlite3-dev sqlite3 autoconf libgdbm-dev libncurses5-dev automake libtool bison pkg-config libffi-dev
  RUN gpg --keyserver hkp://keys.gnupg.net --recv-keys D39DC0E3
  RUN /bin/bash -l -c "curl -L get.rvm.io | bash -s stable"
  RUN /bin/bash -l -c "rvm install 2.1"
  