Map only supports upto level 4

package.nw/data/maps.json

@@ -183,7 +183,7 @@
     "url": "/map/hamgames/{z}/{x}/{y}.png",
     "attributions": "Mapbox",
     "minZoom": 0,
-    "maxZoom": 5,
+    "maxZoom": 4,
     "offline": true
   }
 }