update config

formal

@@ -36,6 +36,7 @@
     "ip": "0.0.0.0",
     "port": 21
   },
+  "img_download": "/pic/kedong/kdimgs/img_download",  
   "media": "/pic/kedong/kdimgs",
   "device_type_en": {
     "cbd": 3,