Merge branch 'fix/pwa_icon_for_ios' into 'dev'

fix(pwa): add icon for ios

Closes #10

See merge request web-et-numerique/pamn_plateforme-des-acteurs-de-la-mediation-numerique/pamn_client!228

src/index.html

@@ -43,6 +43,9 @@
     <!-- Favicon -->
     <link rel="icon" type="image/x-icon" href="favicon.ico" />
 
+    <!-- PWA -->
+    <link rel="apple-touch-icon" sizes="180x180" href="assets/icons/apple-touch-icon.png" />
+
     <!-- CSS & scripts -->
     <link rel="stylesheet" href="https://openlayers.org/en/v4.6.5/css/ol.css" type="text/css" />
     <link