accounted for null

backend/src/main.rs

@@ -58,7 +58,7 @@ async fn main() -> std::io::Result<()> {
             )
             .route("/", web::get().to(index))
     })    
-    .bind(("127.0.0.1", PORT))?
+    .bind(("0.0.0.0", PORT))?
     .run()
     .await;