```js
// Page.stories.js

import Page from './Page.vue';

export default {
  component: Page,
  title: 'Page',
};

const Template = (args, { argTypes }) => ({
  components: { Page },
  setup() {
    return { args };
  },
  template: `
    <page v-bind="args">
      <footer v-if="footer" v-slot=footer v-html="footer"/>
    </page>
  `,
});

export const CustomFooter = Template.bind({});
CustomFooter.args = {
  footer: '<a href="https://storybook.js.org/">Built with Storybook</a>',
};
```