sudo apt-get update
sudo apt-get install software-properties-common
sudo add-apt-repository universe
sudo apt-get update
sudo apt-get install python3-certbot-nginx 

sudo certbot --nginx
#or
sudo certbot --authenticator standalone --installer nginx --pre-hook "service nginx stop" --post-hook "service nginx start"
sudo service nginx restart

crontab -e 
0 0 */1 * * certbot renew