storybook/docs/snippets/common/storybook-preview-auto-docs-override-mdx-container.js.mdx

```js
// .storybook/preview.js

import { MDXProvider } from '@mdx-js/react';

import { DocsContainer } from '@storybook/blocks';

import * as DesignSystem from 'your-design-system';

export const MyDocsContainer = (props) => (
  <MDXProvider
    components={{
      h1: DesignSystem.H1,
      h2: DesignSystem.H2,
    }}
  >
    <DocsContainer {...props} />
  </MDXProvider>
);

export default {
  parameters: {
    controls: {
      matchers: {
        color: /(background|color)$/i,
        date: /Date$/,
      },
    },
    docs: {
      container: MyDocsContainer,
    },
  },
};
```