Static page with a prefix/dynamic URL


Is it possible to create a static page with a prefix URL? maybe with regex?

for example:
All URLs with URI starting with /a will go to the same static page

Currently, if I define the slug to be ‘/a’ it will catch only and all other URLs go to the 404 page.
Also, I tried to define the slug using regex to be* but it does not let me do it.


Here is my site Read-Only: LINK
(how to share your site Read-Only link)