Zero-to-jupyterhub-k8s chart singleuser image name character limit

Hi everyone,

Anyone know why the docs for customizing the single user image state that the image name has to be under 63 characters? https://zero-to-jupyterhub.readthedocs.io/en/latest/customizing/user-environment.html#choose-and-use-an-existing-docker-image

If you are pulling from a private docker repo on AWS, it is pretty easy to breach that limit. For example, <account_id_here>.dkr.ecr.us-east-1.amazonaws.com/something is 60 characters.

Thanks!