ignore side_data

opencv-motion-detect/evcloudsvc-cloud-api.md

@@ -13,6 +13,9 @@ query configuration for edge device with specified sn
 - field "code": 0 - success; otherwise failed.
 - field "msg": string, readable string for "code"
 - field "data": configuration for sn.
+- field .evml.region detecting region box if specified, otherwise using the whole scene.
+  - .center: center pointer of region box in ratio
+  - .wh: width and height of region box in ratioo
 - example
 ```
 {