How can i configure my Domain?

Hi, please.
I am new on 000webhost, i built my website with you.

My web site name = servicopublico.000webhostapp.com

I have the domain “servicopublico.com.br”. How can i do to public and configure to use may domain.

I can not found anything about the domain configuration on site 000webhost.com

When a try to configure on “registro.br” i got the error:

I have called “registro.br” and they told me that problem is on 000webhost.com because needs to configure first.

Where is the option to do this ?

Please, someone can help me ?
Tks

Free plan doesn’t support domains.
You can use domain forwarding if your registrar provides it.