Readme update suggestions

I've got a few suggestions I think would improve the readme.md

The about section references an out of date github repo -- the reference should be removed. https://community.opengroup.org/osdu/platform/deployment-and-operations/infra-gcp-provisioning#about

In Prerequisites -- #6 (closed) about Elastic https://community.opengroup.org/osdu/platform/deployment-and-operations/infra-gcp-provisioning#prerequisites

I think it needs to be explained in a clearer manner -- i.e. outline the options and when they’re appropriate: Production: -Marketplace -ECE (why is it preferred?) -GKE HELM Dev: -Elasticsearch on GCE

In Prerequisites -- #6 (closed) about Elastic

The instructions for "Elasticsearch on GCE" reference a folder and script that don't exist. I think it's a good option - could we fix the instructions?

In the Preparation section https://community.opengroup.org/osdu/platform/deployment-and-operations/infra-gcp-provisioning#preparation

It would be nice if there was a simple diagram explaining the project layout options - i.e. all in one project or services / data separate projects.

It would also be nice if the "operator" user creation had a combined option when running services and data in the same project.

In the environment variables section - it might be nice to add a line that says "detailed explanations below table" pointer? (or I was just too distracted to notice on my 1st run through...)

Thanks! Chad

Edited by Chad Brockman