cleaner ci

frontend/lib/structs/landmark.dart

@@ -2,6 +2,7 @@ class Landmark {
   final String name;
   final List location;
   final LandmarkType type;
+  final String imageURL;
   // final String description;
   // final Duration duration;
   // final bool visited;
@@ -10,6 +11,7 @@ class Landmark {
     required this.name,
     required this.location,
     required this.type,
+    this.imageURL = 'https://upload.wikimedia.org/wikipedia/commons/thumb/a/a8/Tour_Eiffel_Wikimedia_Commons.jpg/1037px-Tour_Eiffel_Wikimedia_Commons.jpg',
     // required this.description,
     // required this.duration,
     // required this.visited,