anchor.diff:  ADD requirements.txt ./
   RUN pip3 --no-cache-dir install --find-links file://${PWD}/cache -r requirements.txt
   
  -#
  -# Mermaid
  -#
  -RUN yarn add mermaid.cli
  -
   VOLUME /pandoc
   WORKDIR /pandoc
   ADD pandoc.sh /usr/local/bin
  
positive.code: ENV DEBCONF_NOWARNINGS yes
  
  #
  # We need yarn to install mermaid
  #
  ADD yarn.list /etc/apt/sources.list.d
  
  #
  # Debian
  #
  RUN set -x && \
  
negative.code:         echo "Acquire::http::Proxy \"${APT_CACHER}\";" | tee /etc/apt/apt.conf.d/01proxy ; \
      fi; \
      apt-get -qq update && \
      apt-get -qy install --no-install-recommends \
          # for deployment
          openssh-client \
          rsync \
  