Updating README with optional config
Updating README with optional config

fancyremarker/docker-kibana,bf4/docker-kibana,canvas-medical/docker-kibana,canvas-medical/docker-kibana,fancyremarker/docker-kibana,bf4/docker-kibana,aaw/docker-kibana,aptible/docker-kibana,aptible/docker-kibana,aaw/docker-kibana