Print direct link to metrics endpoint on startup

src/main.rs

@@ -121,6 +121,7 @@ async fn main() {
 
     let listener = tokio::net::TcpListener::bind(listen).await.unwrap();
     println!("Server listening on: http://{}", listener.local_addr().unwrap());
+    println!("Matrics exposed as: http://{}/metrics", listener.local_addr().unwrap());
 
     axum::serve(listener, app).await.unwrap();
 }