Build a full stack JavaScript app that is functionally similar to this: <ahref="https://yoyo44.herokuapp.com/"target="_blank"rel="noopener noreferrer nofollow">https://yoyo44.herokuapp.com/</a>. Use a site builder of your choice to complete the project.
When you are done, make sure a working demo of your project is hosted somewhere public. Then submit the URL to it in the `Solution Link` field. Optionally, also submit a link to your project's source code in the `GitHub Link` field.