A middleware for wrapping an HTTP val with Basic authentication.
See https://developer.mozilla.org/en-US/docs/Web/HTTP/Authentication
See also: https://www.val.town/v/pomdtr/basicAuth for a different approach
https://rdimartino-basic_auth.web.val.run
https://esm.town/v/rdimartino/basic_auth
<script type="module" src="https://esm.town/v/rdimartino/basic_auth" />
