anchor.diff:  
   COPY docker-entrypoint.sh /
   ENTRYPOINT ["/docker-entrypoint.sh"]
  -CMD ["zkServer.sh", "start-foreground"]
  +CMD ["zkServer.sh", "start-foreground"]
positive.code:     chown "$ZOO_USER:$ZOO_USER" "$ZOO_DATA_LOG_DIR" "$ZOO_DATA_DIR" "$ZOO_CONF_DIR"
  
  ARG GPG_KEY=D0BC8D8A4E90A40AFDFC43B3E22A746A68E327C1
  ARG DISTRO_NAME=zookeeper-3.3.6
  
  # Download Apache Zookeeper, verify its PGP signature, untar and clean up
  RUN set -ex; \
  
negative.code:     bash \
      su-exec
  
  ENV ZOO_USER=zookeeper \
      ZOO_CONF_DIR=/conf \
      ZOO_DATA_DIR=/data \
  