added window check

frontend/app/utils.js

@@ -1,5 +1,3 @@
-"use client";
-
 export const apiUrl =
   typeof window !== "undefined"
     ? process.env.NEXT_PUBLIC_API_URL

frontend/components/Button.js

@@ -1,3 +0,0 @@
-export default function Button({ children }) {
-  return <button>{children}</button>;
-}

frontend/next.config.js

@@ -1,5 +1,7 @@
 /** @type {import('next').NextConfig} */
-module.exports = {
-  reactStrictMode: false,
+const nextConfig = {
   output: "export",
+  reactProductionProfiling: false,
 };
+
+module.exports = nextConfig;