feat: add CTFHub 日历 (#4255)

lib/router.js

@@ -2380,6 +2380,9 @@ router.get('/moxingfans', require('./routes/moxingfans'));
 // Chiphell
 router.get('/chiphell/forum/:forumId?', require('./routes/chiphell/forum'));
 
+// CTFHub Event Calendar
+router.get('/ctfhub/calendar/:limit?/:form?/:class?/:title?', require('./routes/ctfhub'));
+
 // 模型网
 router.get('/moxingnet', require('./routes/moxingnet'));