anchor.diff:  
   WORKDIR ${home}
   
  -# Ruby/rails installation
  -RUN \curl -sSL https://rvm.io/pkuczynski.asc | gpg --import -
  -RUN \curl -sSL https://get.rvm.io | bash -s stable --rails
  -RUN /bin/bash -c "source /usr/local/rvm/scripts/rvm"
  -RUN touch ${home}/.bashrc
  -RUN echo "source /usr/local/rvm/scripts/rvm" >> ${home}/.bashrc
  -RUN /bin/bash -l -c "rvm install 2.4.2"
  -RUN /bin/bash -l -c "rvm install jruby-1.7.25"
  -RUN /bin/bash -l -c "rvm install jruby-9.1.14.0"
  -RUN /bin/bash -l -c "rvm use 2.6.0"
  -
   # AWS CLI installation
   RUN /bin/bash -c "pip3 install awscli"
   
  
positive.code: # Add user
  RUN useradd -ms /bin/bash -u ${uid} ${user}
  
  RUN apt-get update && \
      apt-get install -y --no-install-recommends apt-utils software-properties-common
  
  # Add repositories
  RUN apt-get update && apt-get install -y software-properties-common
  
negative.code: RUN apt-get install -y \
      bash \
      bash-completion \
      docker \
      dos2unix \
      git \
      jq \
      openjdk-8-jdk \
      python \
  