Add iOS Smart App Banner

public/index.html

@@ -6,6 +6,7 @@
         <meta name="theme-color" content="#000000">
         <meta name="apple-mobile-web-app-title" content="What's Open">
         <meta name="apple-mobile-web-app-capable" content="yes">
+        <meta name="apple-itunes-app" content="app-id=1331260366" />
 
         <link rel="manifest" href="%PUBLIC_URL%/manifest.json">
         <link rel="shortcut icon" href="%PUBLIC_URL%/favicon.png">