Update Readme

Author: SecretSettler

README.md

@@ -1,2 +1,20 @@
 # contextpilot.github.io
-The official documentation website for ContextPilot
+The official documentation website for ContextPilot.
+
+## Local Development
+
+**Requirements:** Node.js 18+
+
+```bash
+# Install dependencies (first time only)
+npm install
+
+# Start dev server — opens at http://localhost:3000
+npm start
+
+# Or build and preview the static output
+npm run build
+npm run serve
+```
+
+> **Note:** `npm start` uses client-side rendering — content requires JavaScript to render in the browser. Use `npm run build && npm run serve` if you need to inspect the pre-rendered HTML.