Add image/information to our dockerhub repo

[sambhav]

Description

The Cloud Native Buildpacks Docker Hub repos (buildpacksio and (cnbs)(https://hub.docker.com/u/cnbs)) look pretty sketchy. cnbs is understandable, given that it seems like we only host sample/internal images (though we do reference it in our docs), but given that buildpacksio is a bit more external (we will soon be referring to it in our tekton task (tektoncd/catalog#434), and it is our "official" lifecycle/pack image), we should probably spend some effort making it a bit more trustworthy.

Proposed solution

Add a description/logo to buildpacksio/lifecycle

Additional context

buildpacks/community#27

[sambhav]

Closing since it was fixed in #707