style: define open graph description

src/index.html

@@ -6,8 +6,19 @@
         <base href="/" />
 
         <meta name="viewport" content="width=device-width, initial-scale=1" />
-        <link rel="manifest" href="manifest.webmanifest">
-        <link rel="apple-touch-icon" href="assets/icons/apple-touch-icon.png"/>
+        <meta property="og:type" content="website" />
+        <meta property="og:title" content="IPTVnator" />
+        <meta property="og:url" content="https://iptvnator.vercel.app" />
+        <meta
+            property="og:image"
+            content="https://raw.githubusercontent.com/4gray/iptvnator/electron/iptv-dark-theme.png"
+        />
+        <meta
+            property="og:description"
+            content="IPTVnator is a video player application that provides support for the playback of IPTV playlists (m3u, m3u8)"
+        />
+        <link rel="manifest" href="manifest.webmanifest" />
+        <link rel="apple-touch-icon" href="assets/icons/apple-touch-icon.png" />
         <link rel="icon" type="image/x-icon" href="assets/icons/favicon.ico" />
         <script>
             if (global === undefined) {