> For AI agents: the complete documentation index is available at /llms.txt, the full documentation bundle is available at /llms-full.txt.

# source.configDir

- **Type:** `string`
- **Default:** `'./config'`

Modern.js supports placing some files in the `./config` folder to customize HTML templates, icons, static assets, etc. For details, please refer to [File Convention](/apis/app/hooks/config/html.md).

This option allows you to customize the directory of the configuration files.

For example, adjust the assets directory to the `resources` directory:

```js title="modern.config.ts"
import { defineConfig } from '@modern-js/app-tools';

export default defineConfig({
  source: {
    configDir: './resources',
  },
});
```