docs: create redis-setup.md

[albarbaro]

Description

Add docs for Redis Cache setup

Which issue(s) does this PR fix

• Fixes RHIDP-5196

PR acceptance criteria

Please make sure that the following steps are complete:

• GitHub Actions are completed and successful
• Unit Tests are updated and passing
• E2E Tests are updated and passing
• Documentation is updated if necessary (requirement for new features)
• Add a screenshot if the change is UX/UI related

How to test changes / Special notes to the reviewer

[kim-tsao]

/lgtm

[JessicaJHee]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: JessicaJHee, kim-tsao

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• OWNERS [JessicaJHee,kim-tsao]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[JessicaJHee]

/override "PR Docker Build"

[openshift-ci]

@JessicaJHee: /override requires failed status contexts, check run or a prowjob name to operate on.
The following unknown contexts/checkruns were given:

• PR Docker Build

Only the following failed contexts/checkruns were expected:

• Build Image
• Build with Node.js 20
• Test with Node.js 20
• tide

If you are trying to override a checkrun that has a space in it, you must put a double quote on the context.

In response to this:

/override "PR Docker Build"

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[JessicaJHee]

/override "Build Image"

[openshift-ci]

@JessicaJHee: Overrode contexts on behalf of JessicaJHee: Build Image

In response to this:

/override "Build Image"

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.