Pointing/ directing subdomain to url

I’m trying to direct my subdomain design.bystphie.uk to the url bystphie.uk /design but I can’t figure out how, I know it’s possible because I could do it on my old hosting provider by adding an A record with the name design and the value a (what looked like an) IP address but I can’t remember what the address was

Hi :wave:t6: welcome back to the forums!

Please reference this documentation below: