add pixi watch command

Author: ianhi

.gitignore

@@ -1,4 +1,5 @@
 # project/repo specific
+conf.py
 advanced/backends/*.bin
 scipy-tutorial/dask-report-large-chunk.html
 mydask.png

README.md

@@ -45,24 +45,20 @@ pixi run tutorial
 
 ### Building the Documentation Locally
 
-To build and serve the tutorial website locally as a development server:
-
-1. Build the Jupyter Book:
+To build and serve the tutorial website locally with live reload:
 
 ```bash
-pixi run build
+pixi run watch
 ```
 
-2. Serve the built site locally:
+This watches for changes, rebuilds, and serves at http://localhost:8000.
+
+To build without serving:
 
 ```bash
-pixi run python -m http.server --directory _build/html
+pixi run build
 ```
 
-Then visit http://localhost:8000 in your browser.
-
-Note: The `build` command does not have live rebuilding. You'll need to re-run `pixi run build` after making changes to see updates.
-
 ## Contributing
 
 Contributions are welcome and greatly appreciated! See our [CONTRIBUTING.md](./CONTRIBUTING.md) document.