Unifi OS Let’s Encrypt DNS-01

Hi,

I need some assitence, I am currently building a plan to migrate a Unifi network application server to Unifi OS server. On the old server we had let's encrypt with validation of port 80 I want to change that over DNS so I do not need to have any port open that is not nessecary. And renew automaticly because of the port 80 we open it when we need to and close it when cert is renewed.

I just can't seem to find any documentation about this specific topic.

Any help?

servers both running on ubuntu.