The reseller interface lets you sell supported services from your own domain. It is a management panel, not a public website or homepage.
What you need
You need your own domain. A subdomain such as panel.example.com is normally used for the interface.
The logo and favicon must be hosted elsewhere. You can use a CDN, but each visitor loads the files directly because the interface does not cache them.
DNS records
Create these five hostnames:
panel.example.combackend.panel.example.comlivedata.panel.example.comcdn.panel.example.comnovnc.panel.example.com
Point each hostname to 194.15.36.245 with an A record. The setup checks the records through the 1.1.1.1 DNS resolver. DNS changes can take several hours to become visible.
Once the records pass validation, the interface is created automatically. Setup can take up to 15 minutes.