@panigrc I think it needs some kind of Nginx witchery that I can't replicate in Caddy.
The example Nginx config file is really simple, but when I manually translate it to caddy, it doesn't work at all...
It indeed should be just a reverse proxy, but it won't budge right now...
@panigrc If I do a simple reverse proxy without any other settings, I get an NS_ERROR_DOM_COEP_FAILED
Which - afaict - means that the cross origin embed isnt set up properly.
When I unset the Cross-Origin-Embedder-Policy that is set by Caddy, I get the error that it cant load e.g. /drive/inner.html
And that's where I'm at a loss...