[P] Add TRACK_ID selection in MapView

MapView/config.py

@@ -2,3 +2,5 @@ import os
 
 STORE_HOST = os.environ.get("STORE_HOST") or "localhost"
 STORE_PORT = os.environ.get("STORE_PORT") or 8000
+
+TRACK_ID = int(os.environ.get("TID") or '1')

MapView/main.py

@@ -4,6 +4,7 @@ from kivy_garden.mapview import MapMarker, MapView
 from kivy.clock import Clock
 from lineMapLayer import LineMapLayer
 from datasource import Datasource
+import config
 
 line_layer_colors = [
     [1, 0, 0, 1],
@@ -87,7 +88,7 @@ class MapViewApp(App):
             self.car_markers[user_id].lat = lat
             self.car_markers[user_id].lon = lon
 
-        if user_id == 1:
+        if user_id == config.TRACK_ID:
             self.mapview.center_on(lat, lon)
 
     def set_pothole_marker(self, point):