Add docs how to build thin ds

[Honny1]

Description:

This PR adds documentation on how to build a thin DS.

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[github-actions]

Start a new ephemeral environment with changes proposed in this pull request:

Fedora Environment

Oracle Linux 8 Environment

[github-actions]

🤖 A k8s content image for this PR is available at:
ghcr.io/complianceascode/k8scontent:11900
This image was built from commit: b0c71a4

Click here to see how to deploy it

If you alread have Compliance Operator deployed:
utils/build_ds_container.py -i ghcr.io/complianceascode/k8scontent:11900

Otherwise deploy the content and operator together by checking out ComplianceAsCode/compliance-operator and:
CONTENT_IMAGE=ghcr.io/complianceascode/k8scontent:11900 make deploy-local

[codeclimate]

Code Climate has analyzed commit b0c71a4 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (50% is the threshold).

This pull request will bring the total coverage in the repository to 59.4% (0.0% change).

View more on Code Climate.

[Mab879]

LGTM.

Thanks!