anchor.diff:  	  libmysqlclient-dev \
   	  libssl-dev \
   	  zlib1g-dev && \
  -	apt-get upgrade -y
  +	apt-get upgrade -y && \
  +	apt-get clean
   
   # We setup SSH access
   RUN mkdir -p /var/run/sshd
  
positive.code: 
  # Add wget package
  RUN apt-get update && \
  	apt-get install -y wget
  
  # Update of image and install missing packages
  RUN echo "deb http://ppa.launchpad.net/git-core/ppa/ubuntu trusty main" > /etc/apt/sources.list.d/git-core-ppa-trusty.list && \
  
negative.code: # Secure root login
  RUN echo "root:`date +%s | sha256sum | base64 | head -c 32 ; echo`" | chpasswd
  
  # Launch sshd daemon
  EXPOSE 22
  CMD ["/usr/sbin/sshd", "-D"]