cleanup in view of docker builds

backend/src/structs/linked_landmarks.py

@@ -1,5 +1,4 @@
 import uuid
-
 from .landmark import Landmark
 from utils.get_time_separation import get_time
 
@@ -45,4 +44,18 @@ class LinkedLandmarks:
     
 
     def __str__(self) -> str:
-        return f"LinkedLandmarks, total time: {self.total_time} minutes, {len(self._landmarks)} stops: [\n\t{'\n\t'.join([str(landmark) for landmark in self._landmarks])}\n]"
+        return f"LinkedLandmarks, total time: {self.total_time} minutes, {len(self._landmarks)} stops: [{','.join([str(landmark) for landmark in self._landmarks])}]"
+    
+
+    def asdict(self) -> dict:
+        """
+        Convert the linked landmarks to a json serializable dictionary.
+        
+        Returns:
+            dict: A dictionary representation of the linked landmarks.
+        """
+        return {
+            'uuid': self.uuid,
+            'total_time': self.total_time,
+            'landmarks': [landmark.dict() for landmark in self._landmarks]
+        }