Installing and Setting Up Certbot

Installing snapd to allow you to install the certbot snap package (if you have not previously installed snapd).

sudo apt install snapd

Install and refresh Core.

sudo snap install core; sudo snap refresh core

Install certbot.

sudo snap install --classic certbot

Create certbot symlink.

sudo ln -s /snap/bin/certbot /usr/bin/certbot

Run certbot and follow on screen instructions.

sudo certbot --apache

Open Nextcloud’s configuration file.

sudo nano /var/www/nextcloud/config/config.php

Change ‘trusted_domains’ value to preferred domain.

0 => 'example.domain',