[Koha] DNS for OPAC

Hi. Our library has a website which feature our OPAC, but it shows the IP address. Is it possible to set up a domain name for OPAC using our website's domain name? For example, our website is "library.org", can we make our OPAC domain name "library.org/opac"? We host Koha and our website is being host by web host provider. Thanks. -- Ma. Victoria H. Silva-Manuel Registered Librarian, 3892