message: fix wrong ENV
diff: @@ -34,7 +34,7 @@ node.name: "${HOSTNAME}"\n\
  node.master: "${NODE_MASTER}"\n\
  discovery.zen.minimum_master_nodes: "${DISCOVERY_ZEN_MINIMUM_MASTER_NODES}"' >> config/elasticsearch.yml
  -ENV ES_JAVA_OPTS "-Xms200m -Xmx200m" \
  +ENV ES_JAVA_OPTS="-Xms200m -Xmx200m" \
  DISCOVERY_ZEN_MINIMUM_MASTER_NODES=1 \
  NODE_MASTER=true
  