no name is not allowed

src/game.rs

@@ -40,7 +40,7 @@ async fn index(
 
         form action="/name" method="post" {
             fieldset role="group" {
-                input name="name" placeholder=(t!("funny_name_change_placeholder")) aria-label="Name";
+                input name="name" placeholder=(t!("funny_name_change_placeholder")) aria-label="Name" required;
                 input type="submit" value="Save";
             }
         }