anchor.diff:  # import base image
  -FROM ubuntu:trusty
  +FROM ubuntu:xenial
   
   # install system-wide dependencies,
   # python3 and the build-time dependencies for c modules
  
positive.code: libfreetype6-dev \
  libjpeg8-dev \
  liblcms2-dev \
  libtiff5-dev \
  libwebp-dev \
  libxml2-dev \
  libxslt1-dev \
  nano \
  nginx \
  nodejs \
  npm \
  python3 \
  python3-dev \
  python3-lxml \
  
negative.code: zlib1g-dev
  
  # misc 
  RUN curl -sL https://deb.nodesource.com/setup_6.x | bash - && \
  apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends nodejs && \
  nodejs -v && \
  echo "\ndaemon off;" >> /etc/nginx/nginx.conf && \
  rm /etc/nginx/sites-enabled/default && \
  npm cache clean && \
  npm -g install grunt-cli && \
  cd /tmp && pip3 install -U pip setuptools && locale-gen en_US.UTF-8
  
  # Set the locale
  ENV LANG=en_US.UTF-8 LANGUAGE=en_US:en LC_ALL=en_US.UTF-8
  