Add more Apple icons

assets/dbp-signature.html.ejs

@@ -11,6 +11,11 @@
     <!-- PWA manfiest file -->
     <link rel="manifest" href="<%= getUrl(name + '.manifest.json') %>">
 
+    <!-- PWA iphone -->
+    <link rel="apple-touch-icon" sizes="180x180" href="<%= getPrivateUrl('icon-180x180.png') %>">
+    <link rel="icon" type="image/png" sizes="32x32" href="<%= getPrivateUrl('icon-32x32.png') %>">
+    <link rel="icon" type="image/png" sizes="16x16" href="<%= getPrivateUrl('icon-16x16.png') %>">
+
     <!-- Loading spinner -->
     <script type="module">
         import {Spinner} from '<%= getPrivateUrl('spinner.js') %>';