Allow more image hosts in the custom CSS content security policy

This would be really handy. I personally would need codeberg to be accessible (as it wouldn't be feasible for 20+ images to be loaded from saved media). Given that it would be a security issue to enable it globally on specific sites, perhaps it can be a GUI popup on a per git-repository/base-url basis? (So, prompt to enable it on exampledomain/foo/bar-theme, allowing any file to be loaded from a URL matching that description IF THE USER AUTHORISES IT)