You can take any 2.0 Pen:
https://codepen.io/editor/team/CodePenTemplates/pen/019cfcb5-ae0e-7b17-8d29-744d29b46458

And deploy it:
https://tight-hill-cattle.codepen.app/

Then map it to a subdomain*:
https://subscribe.shoptalkshow.com/

Three-minute video on how here, and docs:
https://blog.codepen.io/docs/pens/deployment/

* apex domains coming soon.