Update manifest and dd add screenshots

examples/magento-graphcms/public/manifest.webmanifest

@@ -1,22 +1,57 @@
 {
   "name": "GraphCommerce",
+  "id": "?homescreen=1",
   "short_name": "GraphCommerce",
+  "description": "GraphCommerce® is a headless e-commerce frontend for Magento.",
   "display": "standalone",
   "theme_color": "#000000",
   "background_color": "#FFFFFF",
   "start_url": "/",
+  "launch_handler": {
+    "client_mode": ["navigate-existing", "auto"]
+  },
+  "orientation": "portrait-primary",
   "icons": [
     {
       "src": "/manifest/favicon-192.png",
       "sizes": "192x192",
       "type": "image/png",
-      "purpose": "any maskable"
+      "purpose": "any"
     },
     {
       "src": "/manifest/favicon-512.png",
       "sizes": "512x512",
       "type": "image/png",
-      "purpose": "any maskable"
+      "purpose": "any"
     }
-  ]
+  ],
+  "screenshots": [
+    {
+      "src": "/manifest/screenshots/home.png",
+      "sizes": "720x1280",
+      "type": "image/png",
+      "form_factor": "narrow",
+      "label": "Homepage"
+    },
+    {
+      "src": "/manifest/screenshots/nav.png",
+      "sizes": "720x1280",
+      "type": "image/png",
+      "form_factor": "narrow",
+      "label": "Navigation"
+    },
+    {
+      "src": "/manifest/screenshots/upsell.png",
+      "sizes": "720x1280",
+      "type": "image/png",
+      "form_factor": "Upsell",
+      "label": "Navigation"
+    }
+  ],
+  "dir": "ltr",
+  "categories": ["developer tools", "shopping"],
+  "lang": "nl",
+  "prefer_related_applications": false,
+  "scope": "https://graphcommerce.vercel.app/",
+  "handle_links": "preferred"
 }