Add etcd as a service discovery mechanism

internal/msggateway/n_ws_server.go

@@ -267,6 +267,8 @@ func (ws *WsServer) registerClient(client *Client) {
 	}
 
 	wg := sync.WaitGroup{}
+	log.ZDebug(client.ctx, "ws.msgGatewayConfig.Discovery.Enable", ws.msgGatewayConfig.Discovery.Enable)
+
 	if ws.msgGatewayConfig.Discovery.Enable != "k8s" {
 		wg.Add(1)
 		go func() {