Add full documentation for Performance Environment Builder
The https://gitlab.com/gitlab-org/quality/performance-environment-builder project has a fine README at the moment but can be fleshed out further with full docs. Task is to do just that.
The https://gitlab.com/gitlab-org/quality/performance-environment-builder project has a fine README at the moment but can be fleshed out further with full docs. Task is to do just that.