Hey guys. Initially I put the certificate only on domain1.com which is the main one. certbot --apache -d domain1.com . How to add more domains whenever you want in the same certificate of domain1.com ?
You can add more -d domain options as needed (100 max), like:
certbot -d example.com -d example.org -d www.example.com -d blog.example.org
Or you can just use one certificate for each domain. It's your choice to make.