Update documentation

[butler54]

Both the readme and validated pattern docs are out of date:

Here is a summary provided to help others with the out of date docs (e.g. crib sheet for where to look).

So the docs are a little out of date so here is the TL;DR for deploying:
Gen secrets is still required to set up some creds. Typically once the first time you deploy
Azure creds are not required. I do some ACM magic to yank the azure creds out to the cluster
inside the repo is a folder called rhdp. That (for our tech sellers) provides an opinionated path to complete deployment that is stable. e..g sh rhdp/wrapper.sh eastasia . This presumes you have azure creds in your environment.
That wrapper script is probably the best place to understand the deployment process
Let's encrypt is no longer required. I thought I updated the readme.md but it seems to have gone. I would discourage you actively from using it as it makes testing harder.