[Bug]: Penpot SERVICE_FQDN_FRONTEND environmental variable has a trailing slash

[HarleySalas]

Description

With the Penpot service install, it adds a trailing slash to the SERVICE_FQDN_FRONTEND and technically, that is a url, not FQDN.I see this pattern a lot with services; the variables are stated as an "FQDN," but an FQDN is simply a host and address, like "example.com" or "sub.example.com," not the https:// prefix, nor a trailing /.

Minimal Reproduction (if possible, example repository)

Just do a one click install of Penpot

Exception or Error

The issue is that for the emails penpot sends, it uses the FQDN to construct it's callback urls and it adds it's own trailing slash, as it expects a FQDN. The result is that we end up with not found pages, instead of getting the correct callback.

This is the sort of url that comes out, note the two forward slashes after .com// https://penpot.mydomain.com//#/auth/recovery?token=(redacted)

Version

297