anchor.diff:  
   RUN chmod u+x /home/user/entrypoint.sh
   
  -CMD tail -f /dev/null
  +RUN ln -s /home/user/sites-available/ui_example_root /home/user/sites-enabled/ui_example_root
  +
  +CMD tail -f /dev/null
  +RUN sudo apt-get update && \
  +	sudo apt-get -y install nano nginx 
  +	
positive.code: 	
  RUN cp -rf /etc/nginx /home/user/ && \
  	chown -R user:user /home/user/
  
  RUN ln -s /home/user/sites-available/ui_example_root /home/user/sites-enabled/ui_example_root
  
  USER user
  
  
negative.code: FROM eclipse/ubuntu_jdk8
  
  USER root
  
  ENV NGINX_PORT_SERVE=8080
  