anchor.diff:  RUN echo "Acquire::http {No-Cache=True;};" > /etc/apt/apt.conf.d/no-cache
   
   ############################################################
  -# Install and configure webserver software
  -############################################################
  -
  -RUN apt-get -y update && \
  -    export DEBIAN_FRONTEND=noninteractive && \
  -    apt-get -y install \
  -      apache2 \
  -      libapache2-mod-auth-kerb \
  -      libapache2-mod-proxy-html \
  -      --no-install-recommends
  -
  -RUN a2enmod proxy
  -RUN a2enmod proxy_http
  -
  -############################################################
  -# This adds everything we need to the build root except those
  -# element that are matched by .dockerignore.
  -# We explicitly list every directory and file that is involved
  -# in the build process but. All config files (like nginx) are
  -# not listed to speed up the build process. 
  -############################################################
   
   # Create dirs
  -RUN mkdir -p $SOURCE_DIR/dist
  -RUN mkdir -p $SOURCE_DIR/app
  -RUN mkdir -p $SOURCE_DIR/test
  +RUN mkdir -p  $SOURCE_DIR/dist \
  +              $SOURCE_DIR/app \
  +              $SOURCE_DIR/test \
  +              $SOURCE_DIR/.git 
   
   # Add dirs
   ADD app $SOURCE_DIR/app
  
positive.code:     cp -rf $SOURCE_DIR/dist/* $WWW_DIR && \
      rm -rf $SOURCE_DIR && \
      apt-get -y --auto-remove purge git nodejs nodejs-legacy npm && \
      apt-get -y clean && \
      rm -rf /var/lib/apt/lists/*
  
  
negative.code: ADD package.json $SOURCE_DIR/
  ADD README.md $SOURCE_DIR/
  
  # Add some git files for versioning
  ADD .git/HEAD $SOURCE_DIR/.git/HEAD
  ADD .git/refs $SOURCE_DIR/.git/refs
  
  ############################################################
  # Install and configure webserver software
  ############################################################
  
  RUN apt-get -y update && \
      export DEBIAN_FRONTEND=noninteractive && \
      apt-get -y install \
        apache2 \
        libapache2-mod-auth-kerb \
        libapache2-mod-proxy-html \
        git \
        nodejs \
        nodejs-legacy \
        npm \
        --no-install-recommends && \
      a2enmod proxy && \
      a2enmod proxy_http && \
      cd $SOURCE_DIR && \
      export GITREF=$(cat .git/HEAD | cut -d" " -f2) && \
      export GITSHA1=$(cat .git/$GITREF) && \
      echo "{\"git\": {\"sha1\": \"$GITSHA1\", \"ref\": \"$GITREF\"}}" > $WWW_DIR/app-version.json && \
      cd $SOURCE_DIR && \
      rm -rf $SOURCE_DIR/.git && \
      git config --global url."https://".insteadOf git:// && \
      cd $SOURCE_DIR && \
      npm install && \
  