bridge_ui: Added tags for SEO (#979)

bridge_ui/public/index.html

@@ -5,7 +5,22 @@
     <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
     <meta name="theme-color" content="#000000" />
-    <meta name="description" content="Portal Token Bridge" />
+    <meta
+      name="description"
+      content="Portal is a bridge that offers unlimited transfers across chains for tokens and NFTs wrapped by Wormhole."
+    />
+    <meta property="og:title" content="Portal Token Bridge" />
+    <meta property="og:type" content="website" />
+    <meta property="og:url" content="https://portalbridge.com" />
+    <meta property="og:image" content="%PUBLIC_URL%/wormhole.png" />
+    <meta property="og:image:alt" content="Wormhole logo" />
+    <meta
+      property="og:description"
+      content="Portal is a bridge that offers unlimited transfers across chains for tokens and NFTs wrapped by Wormhole."
+    />
+    <meta name="twitter:site" content="@wormholecrypto" />
+    <meta name="twitter:creator" content="@wormholecrypto" />
+    <meta name="twitter:card" content="summary_large_image" />
     <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
     <!--
       manifest.json provides metadata used when your web app is installed on a