рабочий вариант, но скороть 10 МБит

backend/cmd/ws-smoke-client/main.go

@@ -16,7 +16,7 @@ import (
 
 func main() {
 	var (
-		gatewayURL        = flag.String("gateway-url", "ws://127.0.0.1:8080/api/v1/gateway/ws", "websocket gateway url")
+		gatewayURL        = flag.String("gateway-url", "", "websocket gateway url")
 		attachToken       = flag.String("attach-token", "", "short-lived attach token")
 		duration          = flag.Duration("duration", 90*time.Second, "maximum time to keep the client attached")
 		heartbeatInterval = flag.Duration("heartbeat-interval", 10*time.Second, "client heartbeat interval")
@@ -27,6 +27,9 @@ func main() {
 	if *attachToken == "" {
 		log.Fatal("attach-token is required")
 	}
+	if strings.TrimSpace(*gatewayURL) == "" {
+		log.Fatal("gateway-url is required")
+	}
 
 	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt)
 	defer cancel()