Add file and error handler

src/main.rs

@@ -18,6 +18,7 @@ async fn main() {
     use leptos::*;
     use leptos_axum::{generate_route_list, LeptosRoutes};
     use libretunes::app::*;
+    use libretunes::fileserv::file_and_error_handler;
 
     use dotenv::dotenv;
     dotenv().ok();
@@ -35,6 +36,7 @@ async fn main() {
 
     let app = Router::new()
         .leptos_routes(&leptos_options, routes, App)
+        .fallback(file_and_error_handler)
         .with_state(leptos_options);
 
     println!("listening on http://{}", &addr);