anchor.diff:  ###  && apt-get autoremove && apt-get clean \
   # delete all the apt list files since they're big and get stale quickly
   ###  && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
  -# this forces "apt-get update" in dependent images, which is also good
   
   # grab gosu for easy step-down from root
   # ENV GOSU_VERSION 1.7
  
positive.code:   && rm -rf /var/lib/apt/lists/* \
  # && rm -rf /var/lib/mongodb
  	&& mv /etc/mongod.conf /etc/mongod.conf.orig
  ###  && echo kernel/mm/transparent_hugepage/enabled = never >> /etc/sysfs.conf \
  ##  && mkdir -p /data/db /data/configdb \
  ##	&& chown -R mongodb:mongodb /data/db /data/configdb
  
  
negative.code: 
  
  # add our user and group first to make sure their IDs get assigned consistently, regardless of whatever dependencies get added
  RUN groupadd -r mongodb && useradd -r -g mongodb mongodb
  
  ### RUN apt-get update \
  ### 	&& apt-get install -y \
  