perf(db): release database before exit

cmd/server.go

@@ -100,7 +100,7 @@ the address is defined in config file`,
 		signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
 		<-quit
 		utils.Log.Println("Shutdown server...")
-
+		Release()
 		ctx, cancel := context.WithTimeout(context.Background(), 1*time.Second)
 		defer cancel()
 		var wg sync.WaitGroup