Override this function to handle uncaught exceptions of client callbacks. E.g. if the browser sends a websocket message back to the kweb instance and the message handler throws an uncaught exception, kweb will invoke this exception handler to expose the fact that a message could not be properly handled
By default, Kweb will handle all paths under /, but this may not be desirable if you have other Ktor route handlers. This config option allows you to add a prefix to the Kweb route handler, e.g. /my_kweb_site, so that only URLs under that path will be handled by Kweb.