CI4 - Installation Location FOLDER example

In my host, there's the root directory in which I'm not allowed to upload files.

We should actually not touching anything outside from our username folder, including /root, /etc, /var,...
So, example our folders from hosting provider, my username is jinbatsu, so usually look like this:
/home/jinbatsu/public_html/
/home/jinbatsu/log/
/home/jinbatsu/mail/
/home/jinbatsu/temp/
...

So, we create new folder for our project CI4 files, example we name it the folder as project1.
/home/jinbatsu/project1/app
/home/jinbatsu/project1/system
/home/jinbatsu/project1/writeable

And public/* files from our CI4 we put to:
/home/jinbatsu/public_html/*

That's it. That's how we make our app and system outside from public_html (which is our default DOCROOT from hosting provider).