Update leveldb

Signed-off-by: Yuan Si <do4suki@gmail.com>

main.go

@@ -1,13 +1,29 @@
 package main
 
 import (
+	"honoka-chan/db"
 	"honoka-chan/router"
 	_ "honoka-chan/tools"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
 
 	"github.com/gin-gonic/gin"
 )
 
 func main() {
+	// 处理系统信号，确保程序退出时关闭数据库
+	signalChan := make(chan os.Signal, 1)
+	signal.Notify(signalChan, syscall.SIGINT, syscall.SIGTERM)
+
+	go func() {
+		<-signalChan
+		log.Println("Shutting down...")
+		db.DB.Close()
+		os.Exit(0)
+	}()
+
 	// Gin
 	gin.SetMode(gin.ReleaseMode)