so my bind config has apparently not worked despite my dig'ing.
and certbot failure has, ...
2021-04-15 10:43:03,646:DEBUG:acme.client:Storing nonce: 0004HnTzBUlghQdQEzv_wTvwyO48A34nYnSNpZ8AAM3Jp8o
2021-04-15 10:43:03,647:WARNING:certbot._internal.auth_handler:Challenge failed for domain
linuxlighthouse.com2021-04-15 10:43:03,647:INFO:certbot._internal.auth_handler:http-01 challenge for
linuxlighthouse.com2021-04-15 10:43:03,648:DEBUG:certbot._internal.reporter:Reporting to user: The following errors were reported by the server:
Domain:
linuxlighthouse.comType: dns
Detail: No valid IP addresses found for
linuxlighthouse.com2021-04-15 10:43:03,649:DEBUG:certbot._internal.error_handler:Encountered exception:
Traceback (most recent call last):
File "/usr/lib/python3.8/site-packages/certbot/_internal/auth_handler.py", line 91, in handle_authorizations
self._poll_authorizations(authzrs, max_retries, best_effort)
File "/usr/lib/python3.8/site-packages/certbot/_internal/auth_handler.py", line 180, in _poll_authorizations
raise errors.AuthorizationError('Some challenges have failed.')
certbot.errors.AuthorizationError: Some challenges have failed.