manifest.json added for webapp declaration

resources/views/layouts/app.blade.php

@@ -10,6 +10,7 @@
     <meta name="mobile-web-app-capable" content="yes">
 
     <title>{{ $title ?? config('app.name', 'Laravel') }}</title>
+    <link rel="manifest" href="/manifest.json">
 
     <meta property="og:site_name" content="{{ config('app.name', 'pixelfed') }}">
     <meta property="og:title" content="{{ $title ?? config('app.name', 'pixelfed') }}">