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

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

import Page from './page.component.ts';

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

export const Template = (args) => ({ 
  props: args,
  template:`
    <storybook-page>
       <ng-container footer>${args.footer}</ng-container>
    </storybook-page>
  `,
});

<Story
  name='CustomFooter'
  args={{
    footer: 'Built with Storybook',
  }}>
  {Template.bind({})}
</Story>
```