The host-it-yourself easiest method is to use starboard-wrap [0], it provides a custom HTML element that wraps the sandboxed iframe. Documentation is a bit lacking, but I'm happy to help out. It should work in any framework.

Alternatively you can create your notebook in starboard.gg and embed it using a standard iframe. It depends a bit on what you want your app to do, if you want to integrate "tightly" with the notebook the first will be the better choice.

[0]: https://github.com/gzuidhof/starboard-wrap