feat: update index meta

Author: xiaoyu2er

apps/index/public/nextjs-im.png

@@ -13,8 +13,79 @@ const geistMono = Geist_Mono({
 });
 
 export const metadata: Metadata = {
-  title: 'Create Next App',
-  description: 'Generated by create next app',
+  metadataBase:
+    process.env.NODE_ENV === 'development'
+      ? new URL('http://localhost:3000')
+      : new URL('https://nextjs.im'),
+  title: 'Next.js Documentation - Multilingual Hub',
+  description:
+    'Access comprehensive Next.js documentation in multiple languages. Built with AI-powered translation and maintained by the community. Available in English, Chinese, and more languages coming soon.',
+  keywords: [
+    'Next.js',
+    'documentation',
+    'multilingual',
+    'i18n',
+    'internationalization',
+    'React',
+    'Chinese',
+    'Simplified Chinese',
+    'Traditional Chinese',
+    'Japanese',
+    'Spanish',
+    'Russian',
+    'French',
+    'German',
+    'Arabic',
+    'Portuguese',
+    'Korean',
+    'translation',
+    'AI-powered',
+    'community-driven',
+    'Deepseek',
+    'OpenAI',
+  ],
+
+  openGraph: {
+    title: 'Next.js Documentation - Multilingual Hub',
+    description:
+      'Access Next.js documentation in multiple languages. AI-powered translations refined by the community.',
+    type: 'website',
+    siteName: 'Next.js i18n Docs',
+    images: [
+      {
+        url: '/nextjs-im.png',
+        width: 1200,
+        height: 630,
+        alt: 'Next.js Documentation - Multilingual Hub',
+      },
+    ],
+  },
+  twitter: {
+    card: 'summary_large_image',
+    title: 'Next.js Documentation - Multilingual Hub',
+    description:
+      'Access Next.js documentation in multiple languages. AI-powered translations refined by the community.',
+    images: [
+      {
+        url: '/nextjs-im.png',
+        width: 1200,
+        height: 630,
+        alt: 'Next.js Documentation - Multilingual Hub',
+      },
+    ],
+  },
+  robots: {
+    index: true,
+    follow: true,
+    googleBot: {
+      index: true,
+      follow: true,
+      'max-video-preview': -1,
+      'max-image-preview': 'large',
+      'max-snippet': -1,
+    },
+  },
+  category: 'technology',
 };
 
 export default function RootLayout({