Configure site for /cg-ai subdirectory deployment

- Set base path to '/cg-ai' in astro.config.mjs
- Update favicon to use metagov.png with dynamic base path
- Add deployment documentation for subdirectory configuration
- Rebuild dist with correct asset paths

CSS and other assets will now load correctly when deployed
to example.com/cg-ai/

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -99,6 +99,22 @@ You can extend the JavaScript in the `<script>` tag for additional interactivity
 
 ## Deployment
 
+### Configuring the Base Path
+
+If deploying to a subdirectory (e.g., `example.com/my-site/`), update `astro.config.mjs`:
+
+```javascript
+export default defineConfig({
+  base: '/my-site',  // Change to your subdirectory path
+});
+```
+
+For root deployment (`example.com/`), remove the `base` option or set it to `'/'`.
+
+**Current configuration**: This site is configured for `/cg-ai` subdirectory.
+
+### Building and Deploying
+
 1. **Build the site**:
    ```bash
    npm run build
@@ -109,9 +125,13 @@ You can extend the JavaScript in the `<script>` tag for additional interactivity
    - **Netlify**: Drag and drop `dist/` to [netlify.com/drop](https://app.netlify.com/drop)
    - **GitHub Pages**: Push `dist/` contents to gh-pages branch
    - **Vercel**: Run `vercel` CLI in project root
-   - **Any static host**: Upload `dist/` folder via FTP/SFTP
+   - **Any static host**: Upload `dist/` folder via FTP/SFTP to your web directory
 
-Note: Deploy the `dist/` folder, not `public/`. The `public/` folder contains source assets that get copied into the build.
+3. **Important**: Deploy the `dist/` folder contents to match your base path:
+   - If `base: '/cg-ai'`, upload dist contents to `public_html/cg-ai/` on your server
+   - If `base: '/'`, upload dist contents to `public_html/` (or your web root)
+
+Note: The `public/` folder contains source assets, not the production build. Always deploy `dist/`.
 
 ## Troubleshooting