add metadata and opengraph tags

client/src/app/layout.tsx

@@ -8,7 +8,21 @@ import ContextProvider from "@/context/ContextProvider";
 
 export const metadata = {
   title: "chessu",
-  description: "Play Chess online."
+  description: "Play Chess online.",
+  openGraph: {
+    title: "chessu",
+    description: "Play Chess online.",
+    url: "https://ches.su",
+    siteName: "chessu",
+    locale: "en_US",
+    type: "website"
+  },
+  robots: {
+    index: true,
+    follow: false,
+    nocache: true,
+    noarchive: true
+  }
 };
 
 export default function RootLayout({ children }: { children: React.ReactNode }) {