anchor.diff:  RUN cd /home && chown -R hida:hida /home/hida
   RUN cd /home/hida/${GRAILS_REPO}-${GRAILS_REPO_VERSION} && sudo -u hida grails clean && sudo -u hida grails compile
   
  -# expose the working directory, the Tomcat port, the Grunt server port, the SSHD port, and run SSHD
  -VOLUME ["/hida"]
  -EXPOSE 8080
  -EXPOSE 9000
  -EXPOSE 22
  +
   CMD    /usr/sbin/sshd -D
  
positive.code: RUN groupadd hida && useradd hida -s /bin/bash -m -g hida -G hida && adduser hida sudo
  RUN echo 'hida:hida' |chpasswd
  
  # install the sample app to download all Maven dependencies
  RUN cd /home/hida && \
      wget https://github.com/arief-hidayat/${GRAILS_REPO}/archive/v${GRAILS_REPO_VERSION}.zip && \
  
negative.code: ADD gvm.config /.gvm/etc/config
  ADD bin/ /usr/local/bin/
  
  # install utilities
  RUN apt-get -y install vim git sudo zip bzip2 fontconfig curl
  
  