message: add new configuration options, set env defaults to match elastic defaults
diff: @@ -39,13 +39,24 @@ RUN echo $'xpack.security.enabled: false\n\
  \n\
  node.name: "${HOSTNAME}"\n\
  node.master: "${NODE_MASTER}"\n\
  +node.data: "${NODE_DATA}"\n\
  +node.ingest: "${NODE_INGEST}"\n\
  +node.ml: "${NODE_ML}"\n\
  +xpack.ml.enabled: "${XPACK_ML_ENABLED}"\n\
  +cluster.remote.connect: "${CLUSTER_REMOTE_CONNECT}"\n\
  discovery.zen.minimum_master_nodes: "${DISCOVERY_ZEN_MINIMUM_MASTER_NODES}"' >> config/elasticsearch.yml
  RUN fix-permissions config
  ENV ES_JAVA_OPTS="-Xms200m -Xmx200m" \
  DISCOVERY_ZEN_MINIMUM_MASTER_NODES=1 \
  - NODE_MASTER=true
  + NODE_MASTER=true \
  + NODE_DATA=true \
  + NODE_INGEST=true \
  + NODE_ML=true \
  + XPACK_ML_ENABLED=true \
  + CLUSTER_REMOTE_CONNECT=true
  +
  VOLUME [ "/usr/share/elasticsearch/data" ]
  