=====Setup=====
 https://www.nginx.com/blog/using-free-ssltls-certificates-from-lets-encrypt-with-nginx/
  apt-get update
  sudo apt-get install certbot
  apt-get install python3-certbot-nginx
  
  vim/etc/nginx/conf.d/www.example.com.conf
<sxh bash; gutter: false>
server {
    listen 80 default_server;
    listen [::]:80 default_server;
    root /var/www/html;
    server_name example.com www.example.com;
}
</sxh>  

  sudo systemctl restart nginx

====Add domain====
  sudo certbot --nginx -d example.com
====Renew all====
  sudo certbot renew
====Automatically Renew Let’s Encrypt Certificates====
  sudo crontab -e
<sxh bash; gutter: false>  
  0 12 * * * /usr/bin/certbot renew --quiet
</sxh>