Add serve function and remove Server re-export (#1868)

examples/websockets/src/main.rs

@@ -66,12 +66,16 @@ async fn main() {
         );
 
     // run it with hyper
-    let addr = SocketAddr::from(([127, 0, 0, 1], 3000));
-    tracing::debug!("listening on {}", addr);
-    axum::Server::bind(&addr)
-        .serve(app.into_make_service_with_connect_info::<SocketAddr>())
+    let listener = tokio::net::TcpListener::bind("127.0.0.1:3000")
         .await
         .unwrap();
+    tracing::debug!("listening on {}", listener.local_addr().unwrap());
+    axum::serve(
+        listener,
+        app.into_make_service_with_connect_info::<SocketAddr>(),
+    )
+    .await
+    .unwrap();
 }
 
 /// The handler for the HTTP request (this gets called when the HTTP GET lands at the start