anchor.diff:  RUN cp /etc/apache2/sites-available/default-ssl.conf /etc/apache2/sites-available/cyber-dojo-ssl.conf
   RUN sed 's/www.html/www\/cyber-dojo\/public/' < /etc/apache2/sites-available/default-ssl.conf > /etc/apache2/sites-available/cyber-dojo-ssl.conf
   
  +RUN sed -i '/Mutex file/d' /etc/apache2/apache2.conf
  +RUN passenger-install-apache2-module --auto
  +
   # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
   # Install cyber-dojo
   
  
positive.code: # Instructions for using this Dockerfile to create a cyber-dojo
  # server inside a docker container.
  #
  # Setup the katas/ folder on the host
  # -----------------------------------
  # $ sudo mkdir -p /var/www/cyber-dojo/katas/
  # $ sudo chmod g+s /var/www/cyber-dojo/katas/
  # $ sudo chown -R 33:33 /var/www/cyber-dojo/katas/
  #
  # Pull the language images you want
  # ---------------------------------
  # $ docker pull cyberdojofoundation/gcc_assert
  # $ docker pull ...
  #
  # Build the image from this Dockerfile
  # ------------------------------------
  # $ docker build -t cyberdojofoundation/server:1.0 .
  #
  # Run the image
  # -------------
  # This needs a data-container for katas/
  # See docker_images_katas folder.
  #
  
negative.code: 
  # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  
  RUN a2enmod passenger
  RUN a2ensite cyber-dojo
  RUN a2dissite 000-default
  