add settings for webkit-app

package.json

@@ -3,6 +3,21 @@
   "version": "0.0.21",
   "description": "Telegram UNOFFICIAL Web App",
   "main": "app/index.html",
+  "single-instance": true,
+  "dom_storage_quota": 40,
+  "window": {
+    "title": "Webogram",
+    "icon": "app/img/icons/icon128.png",
+    "toolbar": false,
+    "frame": true,
+    "position": "center",
+    "resizable": true,
+    "width": 800,
+    "min_width": 675,
+    "height": 650,
+    "min_height": 650,
+    "show": true
+  },
   "scripts": {
     "start": "node server.js"
   },