feat: add add new config strategy to frontend

frontend/src/pages/auth/signUp.tsx

@@ -1,17 +1,16 @@
-import getConfig from "next/config";
 import { useRouter } from "next/router";
 import AuthForm from "../../components/auth/AuthForm";
 import Meta from "../../components/Meta";
+import useConfig from "../../hooks/config.hook";
 import useUser from "../../hooks/user.hook";
 
-const { publicRuntimeConfig } = getConfig();
-
 const SignUp = () => {
+  const config = useConfig();
   const user = useUser();
   const router = useRouter();
   if (user) {
     router.replace("/");
-  } else if (publicRuntimeConfig.ALLOW_REGISTRATION == "false") {
+  } else if (config.get("allowRegistration") == "false") {
     router.replace("/auth/signIn");
   } else {
     return (