Allow using subdomains instead of paths

It would be awesome if we could configure the apps we run on Ultra to use subdomains instead of paths. For example, instead of:

https://user.server.usbx.me/filebrowser

the following is preferable:

https://filebrowser.user.server.usbx.me

Reason being is that browsers remember neither visual settings (like zoom level or dark mode) nor passwords (logging into “/filebrowser” will use the same password as logging into “/jdownloader2”). However, using subdomains completely solves the issue.

I have tried to manually configure a subdomain, but unfortunately it doesn’t work because the SSL certificate for usbx.me doesn’t seem to allow it.