anchor.diff:   && rm -rf /var/lib/apt/lists/*
   
   COPY entrypoint.sh /sbin/entrypoint.sh
  +
   RUN chmod 755 /sbin/entrypoint.sh
   
   EXPOSE 53/udp 53/tcp 10000/tcp
  +
   ENTRYPOINT ["/sbin/entrypoint.sh"]
  +
   CMD ["/usr/sbin/named"]
  
positive.code:     WEBMIN_VERSION=1.8 \
      DATA_DIR=/data
  
  RUN apt-get update \
   && DEBIAN_FRONTEND=noninteractive apt-get install -y gnupg \
   && apt-key adv --fetch-keys http://www.webmin.com/jcameron-key.asc \
   && echo "deb http://download.webmin.com/download/repository sarge contrib" >> /etc/apt/sources.list \
   && rm -rf /etc/apt/apt.conf.d/docker-gzip-indexes \
   && apt-get update \
   && DEBIAN_FRONTEND=noninteractive apt-get install -y \
        bind9=1:${BIND_VERSION}* bind9-host=1:${BIND_VERSION}* dnsutils \
  
negative.code: FROM ubuntu:bionic-20180526 AS add-apt-repositories
  
  RUN apt-get update \
   && DEBIAN_FRONTEND=noninteractive apt-get install -y gnupg \
   && apt-key adv --fetch-keys http://www.webmin.com/jcameron-key.asc \
   && echo "deb http://download.webmin.com/download/repository sarge contrib" >> /etc/apt/sources.list
  
  FROM ubuntu:bionic-20180526
  
  LABEL maintainer="sameer@damagehead.com"
  
  ENV BIND_USER=bind \
  