fix error load html (backend)

backend/src/main.rs

@@ -9,7 +9,7 @@ use tower_http::services::ServeDir;
 async fn main() {
     let app = Router::new()
         .route("/", get(handler))
-        .nest_service("/assets", ServeDir::new("../web/assets"));
+        .nest_service("../web/assets", ServeDir::new("../web/assets"));
 
     let addr = SocketAddr::from(([0, 0, 0, 0], 3500));
     println!("listening on {}", addr);
@@ -20,7 +20,7 @@ async fn main() {
 }
 
 async fn handler() -> Html<String> {
-    let html_content = read_html_from_file("/web/templates/view/index.html")
+    let html_content = read_html_from_file("../web/templates/view/index.html")
         .await
         .unwrap_or_else(|_| "<h1>Error loading HTML file</h1>".to_string());
     Html(html_content)