Update main.ts

main.ts

@@ -4,7 +4,11 @@ serve(async (req: Request) => {
 
   let url = new URL(req.url);
   if (url.pathname == '/' || url.pathname == '') {
-    return new Response("", { status: 502 })
+    return new Response("Not Found", { status: 404 })
+  }
+
+  if (url.pathname == '/ping') {
+    return new Response("pong", { status: 200 })
   }
 
   let res = await fetch(new Request(url.pathname.substring(1) + url.search,req))