+ client: add meta tag to index.html

client/public/index.html

@@ -5,6 +5,7 @@
         <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
         <meta name="theme-color" content="#000000">
         <meta name="google" content="notranslate">
+        <meta http-equiv="x-dns-prefetch-control" content="off">
         <link rel="icon" type="image/png" href="favicon.png" sizes="48x48">
         <title>AdGuard Home</title>
     </head>