fix 修复cron问题

pkg/cron/cron.go

@@ -16,9 +16,8 @@ type Cron struct {
 
 func NewCron() *Cron {
 	now := time.Now()
-	l, _ := time.LoadLocation("Asia/Shanghai")
 	c := &Cron{
-		time: time.Date(now.Year(), now.Month(), now.Day(), 01, 0, 0, 0, l),
+		time: time.Date(now.Year(), now.Month(), now.Day(), 01, 0, 0, 0, now.Location()),
 	}
 	return c
 }