How to make the first deployment of a Frontend app?

Hello everyone! Please tell me. I have a server and a domain connected to the server.
How can I deploy my frontend application using a server and domain on Cleavr?
I use a stack of HTML, CSS, JS.
Can I deploy without using Github, Gitlab and similar systems?

UPD: I connected VERSION CONTROL PROVIDER, but after selecting a Github account, the button is still not active, and I cannot deploy to the selected domain. Is it difficult for you to tell me what to do?

When selecting domain settings, the Deploy now button is inactive and the message pops up
“Configure repository settings before deployment”