I have a domain and website in .onion now I want to make site's mirror in clearnet. How should I do that?
Well, you must make JUST another name-based alias in your web server config. Yes, that's all of it! Because Tor is just a stunnel-like reverse port mapper. So all the rest is managed on your web server and web site side. I do recommend to arise an environment variable like
HTTPS - let's say
DARKNET - so your web site CMS will be omitting any privacy tracking related stuff from the resulting HTML code - like Google Analytics, e.t.c. You don't need to reconfigure your Tor at all! But there is a security issue ;)
To do it properly secure - put your web server into the fully isolated VM or container, then route traffic from Tor and from Clearnet reverse proxy into it. Why's that? To mitigate an exploitation vector for de-anonymizing darknet users: if an enemy will be able to launch a direct request from your web server when your client is visiting you through the darknet(not just Tor - any of them, like I2P, e.t.c...) - a data leak vector is established. That's why you do need this kind of insulation. But no reconfiguration is needed further ;)
Feel free to drop me a line if you need further clarification or help in that question!