Updated README.
Updated README.

rednut/docker-elasticsearch,CanTireInnovations/docker-elasticsearch,gogeolbs/elasticsearch,rednut/docker-elasticsearch,cargonauts/consul-elasticsearch,crccheck/docker-pod,jainishshah17/elasticsearch,yaronr/elasticsearch,kastner/elasticsearch-docker,crccheck/docker-pod,rednut/docker-elasticsearch,nautsio/consul-elasticsearch,rednut/docker-elasticsearch,LastManStanding/elasticsearch,crccheck/docker-pod,n42corp/elasticsearch,eliotk/elasticsearch-docker-beta