re meta#231 set up touch icon as well

public/index.html

@@ -5,6 +5,7 @@
     <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <meta name="viewport" content="width=device-width,initial-scale=1.0">
     <link rel="icon" href="<%= BASE_URL %>favicon.ico">
+    <link rel="apple-touch-icon" href="<%= BASE_URL %>touch-icon.png">
     <meta name="robots" content="noindex" />
     <title>Ordbok – Beta</title>
   </head>