[ci skip] Adds Docker and AWS guide

Open username-removed-293650 requested to merge docker-aws-elasticsearch-guide into master

What does this MR do?

Adds Elasticsearch setup for Docker containers and for AWS Elasticsearch service.

@nick.thomas please review AWS section @grzesiek @dewetblomerus would like your feedback on the docker setup


MR moved from CE https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/10492