fix: kubeconfig server host

Signed-off-by: hongming <talonwan@yunify.com>

pkg/apis/resources/v1alpha2/register.go

@@ -173,7 +173,7 @@ func addWebService(c *restful.Container) error {
 		Returns(http.StatusOK, ok, models.PodInfo{}))
 
 	webservice.Route(webservice.GET("/users/{user}/kubeconfig").
-		Produces("text/plain").
+		Produces("text/plain", restful.MIME_JSON).
 		To(resources.GetKubeconfig).
 		Doc("get users' kubeconfig").
 		Param(webservice.PathParameter("user", "username")).