anchor.diff:  
   RUN cd /opt && \
             apt-get update -y && \
  -          apt-get install -y wget \
  +          apt-get install -y vim \
  +                                             sudo \
  +                                             wget \
  +                                             curl \
                                                gcc \
                                                make && \
             apt-get clean && \
  
positive.code: 
  ARG redis_version=5.0.2
  ARG redis_home=/opt/redis
  
  RUN adduser --disabled-login --gecos '' redis
  
  WORKDIR ${redis_home}
  
  
negative.code:            cd redis-src && \
             make && \
             make PREFIX=${redis_home} install
  
  RUN adduser --disabled-login --gecos '' redis && \
      usermod -G sudo redis
  
  RUN echo "Defaults:redis !requiretty" >> /etc/sudoers.d/redis && \
      echo "redis ALL=(ALL)      NOPASSWD: ALL" >> /etc/sudoers.d/redis && \
      chmod 440 /etc/sudoers.d/redis
  
  RUN chown -R redis.redis ${redis_home} && \
             chown -R redis.redis /opt/redis-src
  