try service worker

frontend-react/public/manifest.json

@@ -19,9 +19,9 @@
       "sizes": "512x512"
     }
   ],
-  "start_url": "https://sendou.ink",
-  "display": "standalone",
-  "theme_color": "#2B5262",
-  "background_color": "#13272E",
+  "start_url": "/",
+  "display": "minimal-ui",
+  "theme_color": "#031e3e",
+  "background_color": "#031e3e",
   "categories": ["games"]
 }

frontend-react/src/index.tsx

@@ -53,7 +53,4 @@ ReactDOM.render(
   document.getElementById("root")
 )
 
-// If you want your app to work offline and load faster, you can change
-// unregister() to register() below. Note this comes with some pitfalls.
-// Learn more about service workers: https://bit.ly/CRA-PWA
-serviceWorker.unregister()
+serviceWorker.register()