A base image that contains S2I tools would facilitate the use of S2I outside OpenShift. An example use-case is the Tekton project upstream:
https://github.com/tektoncd/catalog/tree/master/s2i

The image should be based on UBI images and available both in the Red Hat registry and also in a public registry (Red Hat or elsewhere)

Including buildah in the image should be validate if it's feasible given the different lifecycles that s2i and buildah have. 

Use-Cases

• Tekton Tasks
• GitHub Actions

Acceptance Criteria

• Image should be based on UBI images
• Available in Red Hat registry
• Optionally, in a public registry ( validate if the RHEL base is distributable )
• Should have the s2i cli library
• Optionally, have `buildah` tool installed/available in the image.