ubuntu_rlang recipe not appearing in Dockerhub or in che stack library

[zacharysang]

I am seeing that there is a Dockerfile for ubuntu_rlang in this repo, but it is not published to Dockerhub, is there a reason for this?

I am currently using a custom recipe for R, but would rather use this one to avoid duplication and for organization (My custom R recipe is pretty much the same as the one in this repo, but has some dependencies added).