fix: set parsing in setState

app/lib/main.dart

@@ -87,7 +87,9 @@ class _DefaultPageState extends State<DefaultPage> {
       // Parse json response to list of MarkerData objects if request is ok
       if (response.statusCode == 200) {
         var responseBody = await response.transform(utf8.decoder).join();
-        markerList = parseMarkerData(responseBody);
+        setState(() {
+          markerList = parseMarkerData(responseBody);
+        });
       } else {
         print('Request failed with status: ${response.statusCode}');
       }
@@ -156,12 +158,10 @@ class _DefaultPageState extends State<DefaultPage> {
                           width: markerData.size,
                           height: markerData.size,
                           point: markerData.location,
-                          builder: (ctx) => Container(
-                            child: Icon(
-                              Icons.location_on,
-                              color: markerData.color,
-                              size: markerData.size,
-                            ),
+                          builder: (ctx) => Icon(
+                            Icons.location_on,
+                            color: markerData.color,
+                            size: markerData.size,
                           ),
                         ),
                       )