Added 512 px icon for Android PWA Requirements

src/manifest.json

@@ -7,8 +7,7 @@
     "start_url": "/web/index.html",
     "theme_color": "#101010",
     "background_color": "#101010",
-    "display": "fullscreen",
-    "orientation": "any",
+    "display": "standalone",
     "icons": [{
             "sizes": "72x72",
             "src": "touchicon72.png",
@@ -23,6 +22,11 @@
             "sizes": "144x144",
             "src": "touchicon144.png",
             "type": "image/png"
+        },
+        {
+            "sizes": "512x512",
+            "src": "touchicon512.png",
+            "type": "image/png"
         }
     ],
     "related_applications": [{