feat: add vue-golang-mysql sample

Signed-off-by: fffzlfk <1319933925qq@gmail.com>

vue-golang-mysql/server/cron/cron.go

@@ -0,0 +1,18 @@
+package cron
+
+import (
+	"code-paste/database"
+	"code-paste/model"
+	"time"
+
+	"github.com/robfig/cron/v3"
+)
+
+func Start() {
+	c := cron.New()
+
+	c.AddFunc("@midnight", func() {
+		now := time.Now().Format("2006-01-02 15:04:05")
+		database.DB.Where("expired_at <= ?", now).Delete(&model.Paste{})
+	})
+}