add highlight logic to search card

backend/api/search/serializers.py

@@ -21,7 +21,7 @@ class SearchRouteSerializer(RouteSerializer):
     formatted_arrival = serializers.DateTimeField(source='arrival_DT')
     country_from_icon = serializers.SerializerMethodField()
     country_to_icon = serializers.SerializerMethodField()
-
+    is_highlighted = serializers.BooleanField()
     class Meta:
         model = Route
         fields = (
@@ -30,7 +30,7 @@ class SearchRouteSerializer(RouteSerializer):
             'to_city_name', 'to_city_russian_name', 'to_country_name', 
             'formatted_cargo_type', 'formatted_transport', 'type_transport', 
             'userImg', 'comment', 'formatted_departure', 'formatted_arrival',
-            'country_from_icon', 'country_to_icon'
+            'country_from_icon', 'country_to_icon', 'is_highlighted'
         )
 
     def get_username(self, obj):