Disable PWA on local builds

Signed-off-by: Harsh Shandilya <msfjarvis@gmail.com>

themes/hello-friend-ng/layouts/partials/favicons.html

@@ -1,7 +1,9 @@
 <link rel="apple-touch-icon" sizes="180x180" href="{{"apple-touch-icon.webp" | relURL}}">
 <link rel="icon" type="image/webp" sizes="32x32" href="{{"favicon-32x32.webp" | relURL}}">
 <link rel="icon" type="image/webp" sizes="16x16" href="{{"favicon-16x16.webp" | relURL}}">
+{{ if not .Site.IsServer }}
 <link rel="manifest" href="{{"site.webmanifest" | relURL}}">
+{{ end }}
 <link rel="mask-icon" href="{{"safari-pinned-tab.svg" | relURL}}" color="#252627">
 <link rel="shortcut icon" href="{{"favicon.ico" | relURL}}">
 <meta name="theme-color" content="#252627">

themes/hello-friend-ng/layouts/partials/head.html

@@ -7,6 +7,7 @@
 <meta name="robots" content="noodp" />
 <meta name="flattr:id" content="xj7zpw">
 <link rel="canonical" href="{{ .Permalink }}" />
+{{ if not .Site.IsServer }}
 <script>
     if ('serviceWorker' in navigator) {
         window.addEventListener('load', function () {
@@ -20,6 +21,7 @@
         });
     }
 </script>
+{{ end }}
 
 {{ block "title" . }}
 <title>