extend letsencrypt certificate with dns challenge
Assuming the domain name is
yulrizka.com and the certificate was created with$ certbot certonly --standalone --preferred-challenges dns -d yulrizka.com
To extend this certificate with DNS challenge
# certbot -d yulrizka.com --manual --preferred-challenges dns certonly
You will be asked to add TXT record of
_acme-challenge.yulrizka.com.After updating that DNS record, wait couple of minutes and proceed.