apps/web: fix authContext is undefined

apps/web/pages/index.jsx

@@ -2,6 +2,7 @@ import { Login } from '@/components';
 import { publicRuntimeConfig } from '@/config/runtime';
 import { AuthModeContext } from '@/context/auth-mode';
 import Head from 'next/head';
+import { useMemo } from 'react';
 
 const { APP_DESCRIPTION } = publicRuntimeConfig;
 
@@ -15,8 +16,10 @@ function PageHead() {
 }
 
 export default function Page() {
+  const value = useMemo(() => ({ tfa: false }), []);
+
   return (
-    <AuthModeContext.Provider>
+    <AuthModeContext.Provider value={value}>
       <PageHead />
       <Login />
     </AuthModeContext.Provider>