anchor.diff:  
   ENV TERM xterm
   
  -CMD memcached -d -u memcached -m $MEMCACHE_MAXSIZE_MB -n $MEMCACHE_MIN_ALLOC_SIZE \
  -	&& /usr/lib/rstudio-server/bin/rserver \
  +CMD /usr/lib/rstudio-server/bin/rserver \
   	&& jupyterhub --no-ssl -f jupyterhub_config.py
  
positive.code: ## Services
  ####################
  
  # Memcached parameters
  ENV MEMCACHE_MAXSIZE_MB 100
  ENV MEMCACHE_MIN_ALLOC_SIZE 10
  
  # 8787 for RStudio
  # 8000 for Jupyter
  EXPOSE 8787 8000
  
negative.code: 	m4 \
  	make \
  	man \
  	mongodb \
  	mongodb-server \
  	nano \
  