fix: use lib in main

src/main.rs

@@ -1,10 +1,9 @@
-use axum::{routing::get, Router};
-use itsscb_shuttlings_cch24::hello_world;
+use itsscb_shuttlings_cch24::router;
 
 #[shuttle_runtime::main]
 #[allow(clippy::unused_async)]
 async fn main() -> shuttle_axum::ShuttleAxum {
-    let router = Router::new().route("/", get(hello_world));
+    let router = router();
 
     Ok(router.into())
 }