Updated documentation for running Infinispan in domain mode using Swarm

Could the documentation be updated here and on Docker Hub to detail how to run Infinispan in Domain mode. [See this SO question](https://stackoverflow.com/questions/44889155/run-infinispan-cluster-with-server-management-console-using-docker-swarm).  Even a v3 docker-compose file so that an infinispan stack could be deployed to docker swarm
 