fix wg init

main.go

@@ -107,6 +107,7 @@ func main() {
 	wg := new(sync.WaitGroup)
 
 	for _, ip := range strings.Split(*shellyFlag, ",") {
+		wg.Add(1)
 		go func() {
 			err := checkShelly(ip)
 			if err != nil {
@@ -119,7 +120,6 @@ func main() {
 }
 
 func checkShelly(ip string) error {
-	wg.Add(1)
 	defer wg.Done()
 	log.Infof("shelly worker %s started", ip)