```ts
// Page.stories.ts

import { Meta, Story } from '@storybook/angular';

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

export default {
  /* 👇 The title prop is optional.
  * See https://storybook.js.org/docs/angular/configure/overview#configure-story-loading
  * to learn how to generate automatic titles
  */
  title: 'Page',
  component: Page,
} as Meta;


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

export const CustomFooter = Template.bind({});
CustomFooter.args = {
  footer: 'Built with Storybook',
};
```