enabled client-side static resource caching to improve frontend UX

src/backend/app.ts

@@ -9,8 +9,8 @@ export const createApp = () => {
   app.use(bodyParser.urlencoded({ extended: true }));
 
   app.use("/", createProgressiveForm(mainPageHandler));
-  app.use("/frontend", express.static(path.join(import.meta.dirname, "..", "frontend")));
-  app.use("/shared", express.static(path.join(import.meta.dirname, "..", "shared")));
+  app.use("/frontend", express.static(path.join(import.meta.dirname, "..", "frontend"), { maxAge: 60_000 }));
+  app.use("/shared", express.static(path.join(import.meta.dirname, "..", "shared"), { maxAge: 60_000 }));
 
   return app;
 };