Connecting Server to Domain

Hello,

I have a domain "www.example.com" and a mac mini server at home with public ip "11.22.333.444" . I have a short but difficult question: how do I make sure that when someone enters "www.example.com" in the address bar they are connected to my mac mini server at home? At this moment www.mbkroese.com is connectd to an ip-address of the company where I registered the domain and people see a site which says that this domain is no longer for sale.

Could you please tell me what steps I should take to connect public IP to "www.example.com" ? Thanks in advance.

Sincerely,

MBKTEL