GitOps template Update and Cleanup - 2.0

Description

Template needs to be updated to include changes for 2.0.

A goal for doing this is to establish keeping this template up-to-date as well as provide as a path for illustrating some Big Bang best practices with regards to maintenance and testing updates in a dev/staging environment.

This would likely fulfill the intent behind #42 (closed) as well.

Implementation details

We can use the structure of template to illustrate and document multiple objectives:

1. Have base be pointed to 1.x branch - prod not having a patch would then use this release
2. Have dev be patched to a 2.x. branch
3. Have dev contain values for the default applications in core as of 2.x
4. Have prod contain values for previous defaults of core in 1.x
5. Have a renovate.json target all of these for automated updates