anchor.diff:  
   
   # Install useful extensions
  -
   RUN apt-install \
         libfreetype6-dev \
         libjpeg62-turbo-dev \
  
positive.code: 
  
  # Include composer
  
  RUN apt-install git zlib1g-dev && \
      docker-php-ext-install zip
  
  
negative.code:   && docker-php-ext-install gd
  
  RUN docker-php-pecl-install uploadprogress-1.0.3.1
  