Renew your Let's Encrypt certificate

You are using a Let's Encrypt certificate, but get the warning that it will expire. These are the quick steps to renew it.

1. Adapt your DNS and point it for the domain to your public IP (if it is currently pointing to an internal IP e.g. 192.168.Y.X)
2. Enable port forwarding for port 80/443 for this internal IP
3. Run the renewal
   

   sudo certbot renew

4. If successful, disable the port forwarding again
5. Change the DNS again