增加 cdn 查询

main.py

@@ -2,6 +2,7 @@
 import sys
 
 from py12306.app import *
+from py12306.helpers.cdn import Cdn
 from py12306.log.common_log import CommonLog
 from py12306.query.query import Query
 from py12306.user.user import User
@@ -20,6 +21,7 @@ def main():
 
     ####### 运行任务
     Web.run()
+    Cdn.run()
     User.run()
     Query.run()
     if not Const.IS_TEST: