anchor.diff:      bash \
       su-exec
   
  -# Set up environment varibales
   ENV ZOO_USER=zookeeper \
       ZOO_CONF_DIR=/conf \
       ZOO_DATA_DIR=/data \
  
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: 
  COPY docker-entrypoint.sh /
  ENTRYPOINT ["/docker-entrypoint.sh"]
  CMD ["zkServer.sh", "start-foreground"]