anchor.diff:  RUN mkdir -p "$APP_HOME"
   
   RUN gem install bundler
  -RUN pip install yamllint>=1
  +RUN pip install yamllint
   
   WORKDIR $APP_HOME
   
  
positive.code: FROM ruby:2.4.1
  
  RUN printf "deb http://deb.debian.org/debian testing main\ndeb http://deb.debian.org/debian testing-updates main\ndeb http://security.debian.org testing/updates main" >> /etc/apt/sources.list
  RUN apt-get update && \
      apt-get install --yes --no-install-recommends apt-transport-https=1.0.* && \
      apt-get clean && \
      rm -rf /var/lib/apt/lists/*
  RUN echo 'deb https://deb.nodesource.com/node_6.x jessie main' > /etc/apt/sources.list.d/nodesource.list && \
      curl -s https://deb.nodesource.com/gpgkey/nodesource.gpg.key | apt-key add - && \
      apt-get update && \
      apt-get install --yes --target-release=jessie --no-install-recommends python-pip python-yaml locales nodejs=6.* build-essential && \
      apt-get install --yes --target-release=testing --no-install-recommends git python-sphinx && \
      apt-get clean && \
      rm -rf /var/lib/apt/lists/*
  RUN gem update --no-document --system
  
negative.code: RUN locale-gen
  ENV LC_ALL en_US.UTF-8
  
  RUN curl -o /tmp/chefdk.deb https://packages.chef.io/files/stable/chefdk/1.6.11/debian/8/chefdk_1.6.11-1_amd64.deb && \
      dpkg -i /tmp/chefdk.deb && \
      rm -rf /tmp/chefdk.deb
  
  