It’s a very simple step when you buy your domain. Go to your DNS management, then In the A redirection past your server IP. Your domain will be redirected to your server.
We highly recommend to use Cloudflare to manage your DNS, we are 100% compatible with their services and they will provide you with another layout for security and speed.
They have a free version very powerful.
Thank you for reading,
The Nimblo team.