When you use DNS for the authentication, a token is stored in DNS and lets encrypt will go and look that up and issue a certificate if everything lines up.

What timezone are you?

I’m in the UK, kick off it about 7:45

I have some of my works colleagues join and we all do system updates and talk crap for the evening, its a great way to help others sort things

I’ve been burnt by this, my nginx lxc on proxmox was crashing at about 6:30 every morning for a week. Turns out auto update and debsecure was running on it and using all the 512mb of memory and the lxc would get killed by the host, so removed both as I update Tuesday evenings anyway