anchor.diff:  FROM ubuntu:latest
   
  -ENV REDIS_VERSION 3.0.6
  +ENV REDIS_VERSION 3.2.5
   ENV REDIS_HOME /opt/redis
  +
  +RUN adduser --disabled-password --gecos '' redis
   
   WORKDIR ${REDIS_HOME}
   
  
positive.code:     make && \
      make PREFIX=${REDIS_HOME} install
  
  EXPOSE 6379
  
  ENTRYPOINT ["/opt/redis/bin/redis-server"]
  
negative.code:     apt-get install -y \
       wget \
       gcc \
       make && \
      apt-get clean && \
      wget -q http://download.redis.io/releases/redis-${REDIS_VERSION}.tar.gz && \
      tar -zxvf redis-${REDIS_VERSION}.tar.gz && \
      mv redis-${REDIS_VERSION} redis-src && \
  