I am not too familiar with what is occurring in the background of Binder/JupyterHub, hopefully this topic is in the correct section.
I previously created a Binder for my students to use for distanced learning. The notebooks contain links to specific pre-loaded workspaces that have been modified to include the
JUPYTERHUB_USER value (via the postBuild script):
[Load example workspace](https://hub.gke.mybinder.org/user/$JUPYTERHUB_USER/lab/workspaces/example)
These were sufficient, but presumably mybinder.org now has access to additional clusters and so the GKE number is not always consistent (hub.gke.mybinder; hub.gke1.mybinder; hub.gke2.mybinder).
Is there any way to access this value (gke/gke1/gke2) when launching the server such that the base URL could be updated in the start/postBuild scripts as well?