Add worker ping endpoint

src/worker.ts

@@ -163,6 +163,9 @@ const handleContact = async (request: Request, env: Env) => {
 export default {
     async fetch(request: Request, env: Env): Promise<Response> {
         const url = new URL(request.url);
+        if (url.pathname === "/__worker_ping") {
+            return jsonResponse({ ok: true });
+        }
         const contactPath = url.pathname;
         const isContact =
             contactPath === "/api/contact" ||