在 Docker 客户端安装好了官方版 TensorFlow，启动后进入 jupyter 界面需要密码，但文档中我并没有找到关于默认密码的介绍，请问这是还需要我自己先做别的操作吗？
启动日志：
[I 05:49:17.441 NotebookApp](B Writing notebook server cookie secret to /root/.local/share/jupyter/runtime/notebook_cookie_secret
[W 05:49:17.498 NotebookApp](B WARNING: The notebook server is listening on all IP addresses and not using encryption. This is not recommended.
[I 05:49:17.512 NotebookApp](B Serving notebooks from local directory: /notebooks
[I 05:49:17.513 NotebookApp](B 0 active kernels
[I 05:49:17.513 NotebookApp](B The Jupyter Notebook is running at: http://[all ip addresses on your system]:8888/?token=beecbb2f0e3bb0fc3327575cdaadeb383fbe0e66477dae0e
[I 05:49:17.514 NotebookApp](B Use Control-C to stop this server and shut down all kernels (twice to skip confirmation).
