Improved README.
Improved README.

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