If we do not have a guide created for your domain registrar, you can check out this article for the general. specifics on connecting an external domain to your Universe site.
1. Go to your domain registrar's website and edit your DNS Records.
2. Create a CNAME Record for www pointing to onuniverse.com.
3. Create a new CNAME Record for your root domain (without www) pointing to onuniverse.com. Different registrars require different entries for root domains: some use a period (.) or an @. Others have a drop down or just accept it blank. Please note: If your domain registrar won't allow a CNAME Record for your root domain, try only creating one for www. If your registrar is giving you errors with this step, please proceed to step 4. Since each domain registrar is set up differently, we try to account for all possibilities.
4. If you are unable to set up a CNAME for your root domain, look up your registrars FORWARDING or REDIRECT option to forward your root domain to https://www.yourdomain.com.
Please note that it might take some time (up to 48 hours) for DNS records to setup, but if you have any questions please reach out to the support team in the app or at firstname.lastname@example.org.