Is your feature request related to a problem? Please describe.
Although client-side spawner support has already been added, there's still the last step: send the resource pack to client, which needs a web server holding resource pack files.
Describe the solution you'd like
It's obviously the best to reuse the port that the Minecraft server owns, which can be achieved by some existing projects.
Describe alternatives you've considered
Another acceptable solution is to occupy another port for the web server.