Setting the dns for an add-on domain
I added an add-on domain (a wordpress blog) and tried to use in my domain registrar panel the digital ocean nameservers (ns1.digitalocean.com, ns2.digitalocean.com, ns3.digitalocean.com as per https://www.digitalocean.com/community/tutorials/how-to-set-up-a-host-name-with-digitalocean), but it doesnt work.
So I set up a cloudflare account and use it to direct the A and cname DNS settings so that they point to my DigitalOcean IP. Not a problem per se (now it works), but is it not possible to use directly DO nameservers? I still do not have a working primary domain on Do, just an add-on domain.