use tuple binding in hello world example

layouts/index.html

@@ -59,7 +59,7 @@ async fn main() -> std::io::Result<()> {
             .route("/", web::get().to(greet))
             .route("/{name}", web::get().to(greet))
     })
-    .bind("127.0.0.1:8080")?
+    .bind(("127.0.0.1", 8080))?
     .run()
     .await
 }` "rust" "" }}