anchor.diff:  RUN apt-key adv --keyserver ha.pool.sks-keyservers.net --recv-keys 492EAFE8CD016A07919F1D2B9ECBEC467F0CEB10
   
   ENV MONGO_MAJOR 3.0
  -ENV MONGO_VERSION 3.0.4
  +ENV MONGO_VERSION 3.0.6
   
   RUN echo "deb http://repo.mongodb.org/apt/debian wheezy/mongodb-org/$MONGO_MAJOR main" > /etc/apt/sources.list.d/mongodb-org.list
   
   RUN set -x \
   	&& apt-get update \
  -	&& apt-get install -y mongodb-org=$MONGO_VERSION \
  +	&& apt-get install -y \
  +		mongodb-org=$MONGO_VERSION \
  +		mongodb-org-server=$MONGO_VERSION \
  +		mongodb-org-shell=$MONGO_VERSION \
  +		mongodb-org-mongos=$MONGO_VERSION \
  +		mongodb-org-tools=$MONGO_VERSION \
   	&& rm -rf /var/lib/apt/lists/* \
   	&& rm -rf /var/lib/mongodb \
   	&& mv /etc/mongod.conf /etc/mongod.conf.orig
  
positive.code: VOLUME /data/db
  
  COPY docker-entrypoint.sh /entrypoint.sh
  RUN chmod +x entrypoint.sh
  ENTRYPOINT ["/entrypoint.sh"]
  
  EXPOSE 27017
  
negative.code: 
  # grab gosu for easy step-down from root
  RUN gpg --keyserver ha.pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4
  RUN curl -o /usr/local/bin/gosu -SL "https://github.com/tianon/gosu/releases/download/1.6/gosu-$(dpkg --print-architecture)" \
  	&& curl -o /usr/local/bin/gosu.asc -SL "https://github.com/tianon/gosu/releases/download/1.6/gosu-$(dpkg --print-architecture).asc" \
  	&& gpg --verify /usr/local/bin/gosu.asc \
  	&& rm /usr/local/bin/gosu.asc \
  	&& chmod +x /usr/local/bin/gosu
  