anchor.diff:    && 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
   
  
positive.code: 
  # https://docs.mongodb.com/manual/tutorial/install-mongodb-on-ubuntu/
  # RUN echo "deb [ arch=amd64,arm64 ] http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/3.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.4.list
  
  RUN echo "deb http://repo.mongodb.org/apt/ubuntu xenial/mongodb-org/$MONGO_MAJOR multiverse" > /etc/apt/sources.list.d/mongodb-org-$MONGO_MAJOR.list
  # RUN echo "deb http://repo.mongodb.org/apt/ubuntu trusty/mongodb-org/3.4 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-3.2.list
  
  RUN set -x \
  	&& apt-get update \
  	&& apt-get install -y \
  ## from mongodb repo dev version 3.5.13
  ##      --allow-unauthenticated\
  ##        mongodb-org-unstable \
  ## from mongodb repo production version 3.4.9
  ##      --allow-unauthenticated\
          mongodb-org \
  # from ubuntu repo version 3.2.11
  ##      mongodb \
  #		${MONGO_PACKAGE}=$MONGO_VERSION \
  #		${MONGO_PACKAGE}-server=$MONGO_VERSION \
  #		${MONGO_PACKAGE}-shell=$MONGO_VERSION \
  
negative.code: ###  && 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/*
  
  # grab gosu for easy step-down from root
  # ENV GOSU_VERSION 1.7
  