Is there a way to select the default directory in HTML? [closed]

I have the same question as this guy execpt I need to do it in html. There’s a way to set a default directory for the images used in css?

I made a website from scratch but now I need to put it on WordPress. I tried using iframe to so could just put everything in WordPress’s Media section so it would be in the same directory but turned out weird like this:the weird iframe.
I also have a GitHub repo for my website: https://github.com/maplehe7/daisyli