Speed up font loading

Author: TheElectronWill

doc-tool/resources/_layouts/base.html

@@ -10,6 +10,10 @@
 
         <link rel="icon" type="image/png" href="{{ site.baseurl }}/images/favicon.png">
 
+        <link rel="dns-prefetch" href="//fonts.googleapis.com">
+        <link rel="preconnect" href="https://cdnjs.cloudflare.com" crossorigin>
+        <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
+
         <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.9.0/css/all.min.css">
         <link rel="stylesheet" href="{{ site.baseurl }}/css/bootstrap.min.css">
         <link rel="stylesheet" href="{{ site.baseurl }}/css/dottydoc.css">