[Feature Request] Change `UploadService.DisplayURL` to `UploadService.ProxyURL`

[OoLunar]

Currently ImageFrame requires an entire subdomain by enforcing POST /upload to the root of the (sub)domain. Instead I believe it would make more sense if the proxy url was prepended to any other paths the embedded web server requires.

Example config:

# ImageFrame's convenient upload system where you can upload directly through an embedded web server
UploadService:
  # Changing this value requires a restart
  Enabled: true
  # This is the base URL the plugin uses.
  ProxyURL: https://example.com/image_frame/
  WebServer:
    # Address in which the webserver binds to, defaults to 0.0.0.0
    # Use 127.0.0.1 to limit to local access
    # Changing this value requires a restart
    Host: 0.0.0.0
    # Port in which the webserver is hosted, make sure it is not blocked by your firewall
    # Changing this value requires a restart
    Port: 8517

Creating an upload link would look like: GET example.com/image_frame/?user=0000-0000-0000-0000
Uploading the image body would look like: POST example.com/image_frame/upload?...

[LOOHP]

I'm not sure I understand what the suggestion is fully. Currently the DisplayURL is just for the clickable link in the chat message for the player. The web server itself just listens to the root path for GET and the root path + /upload for POST on whatever it is hosted on.

[OoLunar]

Hey, sorry for the delay! I'm requesting for the web server to not listen on hardcoded HTTP paths, most notably the root path. Being able to change which paths the server listens on allows for other proxy software like Nginx or Caddy to be able to serve multiple services under a single domain name, which is what I'm trying to achieve right now.

The standard convention is to allow for a path to be prefixed, I.E turning POST example.com/upload to POST example.com/image_frame/upload. This allows for more flexibility with other softwares while still allowing you to define your HTTP paths to however you'd like.