Automate build

[BruceWestbury]

Can I improve my workflow? This consists in:

edit, ..., edit, build, refresh page in browser, edit, ... (repeat)

I am using VSCode as my editor. Can I set this so the build and refresh happen automatically
every time I save a file? I use VSCode for other editing e.g. python code so I only
want this to happen when I am working on a book.

[choldgraf]

Right now what I do is use this useful VSCode plugin:

https://marketplace.visualstudio.com/items?itemName=ritwickdey.LiveServer

e.g.:

then you just navigate your server to the _build/html folder and it'll open a browser window that auto-updates when you re-build your book 👍

Longer-term, I think it'd be great if Jupyter Book had something like jupyter-book build mybook/ --watch that would run the server for you