anchor.diff:  #
   FROM debian:stretch-slim
   MAINTAINER Christian chriswayg@gmail.com
  +
  +# Environment setting only used during build
  +ARG DEBIAN_FRONTEND=noninteractive
   
   # If no Nickname is set, a random string will be added to 'Tor4'
   ENV TOR_NICKNAME=Tor4 \
  
positive.code: 
  # Install prerequisites
  RUN apt-get update &&  \
  	DEBIAN_FRONTEND=noninteractive apt-get install --no-install-recommends --no-install-suggests -y \
        apt-transport-https \
        ca-certificates \
        dirmngr \
  
negative.code:   echo "deb http://deb.torproject.org/torproject.org obfs4proxy main" >> /etc/apt/sources.list.d/tor-apt-sources.list && \
  # Install tor and obfs4proxy & backup torrc
    apt-get update && \
    apt-get install --no-install-recommends --no-install-suggests -y \
      tor \
      deb.torproject.org-keyring \
      obfs4proxy && \
  