Talk to jupterbook and matt about launching configurd jupyterhub

[jlperla]

Right now only a hardcoded ubtton https://jupyterbook.org/interactive/launchbuttons.html#jupyterhub-buttons-for-your-pages

What would be required to have it configurable...

Get this working with a hardcoded ubc syzygy jupyerhub button. Turn off later if we wish.