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

examples/error-handling-and-dependency-injection/src/main.rs

@@ -17,7 +17,7 @@ use axum::{
 };
 use serde::{Deserialize, Serialize};
 use serde_json::json;
-use std::{net::SocketAddr, sync::Arc};
+use std::sync::Arc;
 use tracing_subscriber::{layer::SubscriberExt, util::SubscriberInitExt};
 use uuid::Uuid;
 
@@ -42,12 +42,11 @@ async fn main() {
         .with_state(user_repo);
 
     // Run our application
-    let addr = SocketAddr::from(([127, 0, 0, 1], 3000));
-    tracing::debug!("listening on {}", addr);
-    axum::Server::bind(&addr)
-        .serve(app.into_make_service())
+    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).await.unwrap();
 }
 
 /// Handler for `GET /users/:id`.