Add go-chi/cors middleware for preflight CORS checks server-side
I'd love to have this enhancement added to the router, it would allow front end applications to send HTTP requests via the Fetch API.  

Instead of a server side application with its own API that makes the requests to Moneropay in order to get around CORS errors, I could just send HTTP requests via a frontend web app - reducing the overall amount of JavaScript involved.

Would this be a reasonable thing to implement?  Am I missing something here?