anchor.diff:  #  compiling from source because don't want the dependencys of x11 (alternative to apt-get install libvips-dev)
   #  apt-get install libglib2.0-0 libxml2 libexif12 libjpeg8 libtiff5 libpng12-0 liblcms2-2 liborc-0.4-0 libfftw3-3
   RUN    mkdir -p /tmp/vips \
  -    && curl -L http://www.vips.ecs.soton.ac.uk/supported/current/vips-7.42.1.tar.gz | tar -xzC /tmp/vips --strip-components=1  \
  +    && curl -L http://www.vips.ecs.soton.ac.uk/supported/current/vips-8.4.4.tar.gz | tar -xzC /tmp/vips --strip-components=1  \
       && cd /tmp/vips \
       && ./configure --disable-docs \
       && make \
  
positive.code: FROM debian:stable
  
  ENV RUBY_MAJOR 2.2
  ENV RUBY_VERSION 2.2.0
  
  RUN echo 'gem: --no-document --no-rdoc --no-ri' > /etc/gemrc
  
  
negative.code: 
  
  
  # vips, imagemagic and their dependencys consumes ~500MB !? :( so compiling them.
  # Install build dependencys for imagemagic and vips
  RUN    apt-get update -qq \
      && DEBIAN_FRONTEND=noninteractive apt-get install -qq pkg-config libglib2.0-dev libxml2-dev libexif-dev libjpeg8-dev libtiff5-dev libpng12-dev liblcms2-dev liborc-0.4-dev libfftw3-dev \
  