doc: add quick-start guide

[Madhu-1]

Describe what this PR does

added a quick start guide for the minimal installation

Is there anything that requires special attention

List items that are not part of the PR and do not impact it's functionality, but are work items that can be taken up subsequently.

Checklist:

• [ ] Commit Message Formatting: Commit titles and messages follow

  guidelines in the developer guide.

• [ ] Reviewed the developer guide on Submitting a Pull Request
• [ ] Pending release notes updated with breaking and/or notable changes for the next major release.
• [ ] Documentation has been updated, if necessary.
• [ ] Unit tests have been added, if necessary.
• [ ] Integration tests have been added, if necessary.

[Madhu-1]

@nb-ohad PTAL

[Madhu-1]

@nb-ohad PTAL

[Madhu-1]

I am surprised that the guide does not mention building the operator. Even if this is making use of published images, I think developers want to test locally built images with their local changes.

That will be a follow-up to add/update the document on how to test the local changes.

[Madhu-1]

I tried the steps in the guide and they all work with one exception:

Creation of the clientProfile fails like this:

Error from server (BadRequest): error when creating "STDIN": ClientProfile in version "v1alpha1" cannot be handled as a ClientProfile: strict decoding error: unknown field "spec.cephFs.subvolumeGroup"

Thats for catching it, it was a typo from my side, its fixed now

[Madhu-1]

@nb-ohad PTAL