making invisible visible

app.py

@@ -135,8 +135,8 @@ def generate_static_map(geojson_data, bounds=None):
         # Add a small invisible marker to prevent rendering error
         #log marker
         logging.info(f"Adding invisible marker to {bounds[0], bounds[1]}")
-        m.add_marker(CircleMarker(tuple(bounds[0]), '#FFFFFF', 0))  # White marker with size 0
-        m.add_marker(CircleMarker(tuple(bounds[1]), '#FFFFFF', 0))  # White marker with size 0
+        m.add_marker(CircleMarker(tuple(bounds[0]), 'blue', 10))  # White marker with size 0 #FFFFFF
+        m.add_marker(CircleMarker(tuple(bounds[1]), 'blue', 10))  # White marker with size 0
         return m.render()
 
     # Process each feature in the GeoJSON