Update README.

README.md

@@ -1,3 +1,26 @@
 All art is by [Nina Paley][]!
 
+## Quick start
+
+This requires [NodeJS][].  It was started with
+NodeJS 14.15.4, but hopefully it should work with
+any recent version.
+
+After cloning the repository and entering it, run:
+
+```
+npm run watch
+```
+
+then visit http://localhost:1234.
+
+## Deployment
+
+To deploy the project to GitHub Pages, run:
+
+```
+npm run deploy
+```
+
+[NodeJS]: https://nodejs.org/en/
 [Nina Paley]: https://blog.ninapaley.com/