ubuntu@test:~$ sudo /snap/bin/nextcloud.setup-https 
This snap ships Nextcloud already configured with a self-signed
certificate. This utility allows you to obtain a certificate via Let's
Encrypt.

In order for Let's Encrypt to verify that you actually own the domain for
which you're requesting a certificate, there are a number of requirements
of which you need to be aware:

1. In order to register with the Let's Encrypt ACME server, you must agree
   to the currently-in-effect Subscriber Agreement located here:

       https://letsencrypt.org/repository/

   By continuing to use this tool you agree to these terms. Please cancel
   now if otherwise.

2. You must have the domain name(s) for which you want certificates
   pointing at the external IP address of this machine.

3. Both ports 80 and 443 on the external IP address of this machine must
   point to this machine (e.g. port forwarding might need to be setup on
   your router).

Have you met these requirements? (y/n) y
Please enter an email address (for urgent notices or key recovery): yo@elopio.net
Please enter your domain name(s) (space-separated): test.elopio.net
Attempting to obtain certificates... done
Stopping apache... done
Starting apache... done