Fixes #15356: Fix assignment of front & rear images to device types via REST API

netbox/dcim/api/serializers.py

@@ -326,8 +326,8 @@ class DeviceTypeSerializer(NetBoxModelSerializer):
     airflow = ChoiceField(choices=DeviceAirflowChoices, allow_blank=True, required=False, allow_null=True)
     weight_unit = ChoiceField(choices=WeightUnitChoices, allow_blank=True, required=False, allow_null=True)
     device_count = serializers.IntegerField(read_only=True)
-    front_image = serializers.URLField(allow_null=True, required=False)
-    rear_image = serializers.URLField(allow_null=True, required=False)
+    front_image = serializers.ImageField(required=False, allow_null=True)
+    rear_image = serializers.ImageField(required=False, allow_null=True)
 
     # Counter fields
     console_port_template_count = serializers.IntegerField(read_only=True)