increase workers for more concurrency

src/main.rs

@@ -100,7 +100,7 @@ async fn main() -> std::io::Result<()> {
             .service(Files::new("/", "./public").index_file("index.html"))
     })
     .bind(("localhost", 4242))?
-    .workers(2)
+    .workers(4)
     .run()
     .await
 }