Mirrored wordpress site to live domain

I have a Wordpress install that is a mirror of the live domain. The site is under development. I installed this a few years ago before the recommended HOSTS file method was made popular :slight_smile:

Client got back and we finished and now I am ready to go live. What method should I follow to make this live? I have (and am) used(ing) the mirrors on other sites I have built and hosted n the past here. But I am willing to do almost anything to do this PROPERLY if that is not the recommended method with a Wordpress site. As I know it does cause confusions in the admin locations etc…

Thanks for any advice and guidance