Explicitly enable HTTPS
Explicitly enable HTTPS

https://github.com/jupyterhub/zero-to-jupyterhub-k8s/pull/1758
wasn't actually backwards compatible - we need to explicitly
set this now.

berkeley-dsep-infra/datahub,ryanlovett/datahub,ryanlovett/datahub,berkeley-dsep-infra/datahub,ryanlovett/datahub,berkeley-dsep-infra/datahub