Sure thing, but essentially it would be another thing that we have to make sure that it is protected and performant. At the time of building a startup, that’s still an item we are leaving someone else to manage.

It's simple to setup a resolver, really. Basically just "apt install unbound" and you have a resolver ready.

the only thing you might have to adjust is the access control

https://www.linuxbabe.com/ubuntu/set-up-unbound-dns-resolver...

      access-control: 10.0.0.0/8 allow
      access-control: 127.0.0.1/24 allow
      access-control: 2001:DB8::/64 allow