How can I start a Jupyter server from Python

I have an existing Python process running a Tornado web application (Dask) and I would like to run a Jupyter notebook server from within this process, on the same event loop. I looked around and couldn't find any good documentation on how to start Jupyter from within Python. Is this easy?

Ideally I would do something like the following:

```python
from notebook import Server

io_loop = tornado.ioloop.IOLoop.current()

server = Server(io_loop=io_loop)
await server.start()
```

Start by investigating the Python notebook.Server API and Tornado's IOLoop integration described in the issue. Confirm whether a Jupyter server can run within an existing Dask web application's event loop, then document the supported startup pattern and its limitations.

Written by the indexing model from the issue text.