CORS in standalone server

Hi,

I'm trying to get CORS working in standalone server.
Attempted this solution but unfortunately it no longer works with v10
https://github.com/trpc/trpc/issues/623

And with my own code for v10 it throws a "405 METHOD_NOT_SUPPORTED" when the method is set to OPTIONS

Thanks, tho it would be helpful to have some reference in the actual docs page

https://trpc.io/docs/v10/cors has nothing about server side implementation