```md
<!-- Page.stories.mdx -->

import { Meta, Story } from '@storybook/addon-docs';

import { Page } from './page.component';

<Meta title="Page" component={Page} />

<Story
  name="CustomFooter"
  args={{
    footer: 'Built with Storybook',
  }}
  render={(args) => ({
    props: args,
    template:`
      <storybook-page>
        <ng-container footer>${args.footer}</ng-container>
      </storybook-page>
    `,
  })} />
```