docs: extended Patchable readme

[dervoeti]

Description

Has been on my todo list for a while, this adds some information to the Patchable README that was only available in Nuclino.

Definition of Done Checklist

Note

Not all of these items are applicable to all PRs, the author should update this template to only leave the boxes in that are relevant.

Please make sure all these things are done and tick the boxes

• Changes are OpenShift compatible
• All added packages (via microdnf or otherwise) have a comment on why they are added
• Things not downloaded from Red Hat repositories should be mirrored in the Stackable repository and downloaded from there
• All packages should have (if available) signatures/hashes verified
• Add an entry to the CHANGELOG.md file
• Integration tests ran successfully

TIP: Running integration tests with a new product image

The image can be built and uploaded to the kind cluster with the following commands:

boil build <IMAGE> --image-version <RELEASE_VERSION> --strip-architecture --load
kind load docker-image <MANIFEST_URI> --name=<name-of-your-test-cluster>

See the output of boil to retrieve the image manifest URI for <MANIFEST_URI>.

[Techassi]

Partial review, a few small suggestions.

[Techassi]

Second half of the review done. Only two small comments, lgtm otherwise.

[Techassi]

Good from my side.

Maybe @NickLarsenNZ also wants to take a look (because you requested a review from him).

[dervoeti]

Good from my side.

Maybe @NickLarsenNZ also wants to take a look (because you requested a review from him).

Thanks! Nah it's fine, I just requested it from him because we recently talked about it in a Slack thread. But you were probably even the better candidate to review this.