Оригинальная инструкция: https://certbot.eff.org/instructions?ws=nginx&os=ubuntufocal
sudo apt update
sudo apt install snapdsudo snap install core; sudo snap refresh coresudo apt-get remove certbotsudo snap install --classic certbotsudo ln -s /snap/bin/certbot /usr/bin/certbotsudo certbot --nginxIf you wish to add another SSL-certificate, just run:
sudo certbot certonly --nginx --agree-tos --expand -d secretic.app