number sections and document sidebar ordering

docs/content/04-deployment/index.md

@@ -0,0 +1,9 @@
+# Deployment
+
+Archivox sites output to the `_site/` folder. Host the contents on any static server. For Netlify, include a `netlify.toml` file:
+
+```toml
+[build]
+  command = "npm run build"
+  publish = "_site"
+```