Hi @MaoriPanda, and welcome to the LE community forum
Please help us to help you.
Without answers to those questions, we are left to our imaginations.
[and, frankly, some of us just aren't that imaginative - LOL]
I have never seen any private information within the LE logs, so it is safe to post them here.
I can say that the FQDN you mention doesn't return an A, nor AAAA, record.
So, I suspect that you may be trying to get a certificate via DNS authentication.
But you also mention nginx
and that leans me towards HTTP authentication.
Here I am left to my feeble imagination.
And... I imagine that you aren't trying to do both.
Providing the full nginx
fault information may also be helpful.
I see that you are using Cloudflare
CDN for the base domain.
And, also, Cloudflare DNS for authoritative servers.
That is something others should be made aware of.
You also mention docker
.
That presents its' own set of challenges.
You should be informed that in order to obtain a certificate, via HTTP authentication, you must have a working HTTP path to your system/ACME client.
You have posted on an LE forum, so I'm pretty certain you are trying to obtain an LE cert.
But you don't specifically mention which ACME client you are using.
You did mention the LE log file, which leads me to believe you are using certbot
.
But you haven't exactly made that clear.
You didn't say where the commands were run.
I imagine they were tried within the docker
container.
You didn't show any of the commands that you have tried, nor their failures; Which can be helpful to us.
Not even the version of certbot
in use was provided.
It may seem like these things might not matter much.
But they do; And they add up quickly.
The only way to get truly informed replies, is to provide enough information so that others may do so.
I imagine that together we can resolve your problem(s) and get your app secured.