如何禁用tidb dashboard 自启动?

简单翻了下代码,Dashboard的启动逻辑是写死在pd启动流程里面的,没办法单独控制,参考:
https://github.com/tikv/pd/blob/c8c5e1e215a144066c5db3e9f9a32e79e3157bd2/cmd/pd-server/main.go#L241