Feat / Deterministic public URLs

[langemike]

When you build an OTT app for another platform than web, we cannot rely on the value of window.location.origin.

In a lot of hybrid web-apps, this variable will contain a URL to a local webserver. Eg. capacitor://localhost for Capacitor based platforms.

This caused two bugs:

1. It caused a "not valid URL" error message in the "Reset password" form - OTT-2707
2. It caused an infinite spinner when using "Send password reset mail" from your account settings. This happens because of the same (but uncaught) error. - OTT-2804

While we fixed this issue, we took it a step further to completely remove window.location.origin references throughout the project.

When APP_PUBLIC_URL is not defined within your (web) .env-file, we still fallback on the the same value, making this a non-breaking change.