feat: refactor go.mod.

registry/etcd/client.go

@@ -1,9 +1,9 @@
 package etcd
 
 import (
+	etcdKratos "github.com/go-kratos/kratos/contrib/registry/etcd/v2"
 	"github.com/go-kratos/kratos/v2/log"
 
-	etcdKratos "github.com/go-kratos/kratos/contrib/registry/etcd/v2"
 	etcdClient "go.etcd.io/etcd/client/v3"
 
 	conf "github.com/tx7do/kratos-bootstrap/api/gen/go/conf/v1"
@@ -11,6 +11,10 @@ import (
 
 // NewRegistry 创建一个注册发现客户端 - Etcd
 func NewRegistry(c *conf.Registry) *etcdKratos.Registry {
+	if c == nil || c.Etcd == nil {
+		return nil
+	}
+
 	cfg := etcdClient.Config{
 		Endpoints: c.Etcd.Endpoints,
 	}