edit activity-op-ui.js previewHost to http

lua-ui/config/activity-op-ui.js

@@ -2,7 +2,7 @@
 const apiHost = 'http://actapi.domain.com';
 const opHost = 'http://opapi.domain.com';
 const qiniuHost = 'https://ohsx2fi5w.bkt.clouddn.com/';
-const previewHost = 'https://activity.domain.com/activity/';
+const previewHost = 'http://activity.domain.com/activity/';
 const domain = '.domain.com';
 const goodsApiHost = 'http://mallapi.domain.com';