Pythonanwhere Facebook app Canvas URL no longer available

Am trying to follow the PythonAnywhere Facebook app example, but get stuck early on trying to set the Canvas URL per PA's instructions. It appears that FB wants to force me to use Heroku for this; and they now call it a "Hosting URL". Is there a workaround?

Hi there, I answered a v similar question on stackoverflow at the weekend, are you the same person?