How to configure kibana.yml and elasticsearch.yml to run ELK in production.
Domain name: mydomainname
Server: Apache
Welcome!
For Elasticsearch, I'd read from https://www.elastic.co/guide/en/elasticsearch/reference/current/setup.html
For Kibana, I'd read from https://www.elastic.co/guide/en/kibana/current/settings.html
Even better, I'd simply start a full cluster from cloud.elastic.co 
One-click deploy with all what you need.