```js
// .storybook/main.js

export default {
  // Your Storybook configuration
  refs: {
    'design-system': {
      title: 'Storybook Design System',
      url: 'https://5ccbc373887ca40020446347-yldsqjoxzb.chromatic.com',
      expanded: false, // Optional, true by default
    },
  },
};
```