Documentation: Deploying and Maintaining Infrastructure

As a user of bedrock, I would like documentation that explains how Bedrock makes it easier for me to deploy and maintain K8s one or many clusters at an infrastructure level with Terraform.

This item covers:

[x] Pattern: Multiple nearly identical clusters differentiated by only small config changes.
[x] Pattern: Separating template from implementation and how that enables centralized updates and local applications.
[x] Practice: Scaffolding
[x] Practice: Generating
[x] Practice: Versioning and upgrading underlying templates.

microsoft / bedrock

Documentation: Deploying and Maintaining Infrastructure #763