Generate my.cfg:
./replace_password <<< SecretPassword123
Start a http server:
python3 -m http.server --bind XXX.XXX.XXX.XXX 3000
Meanwhile, download Network Installer iso from alt.fedoraproject.org.
Either burn the the iso to usb, or run it in a virtual machine.
When the iso starts, the first thing you will see is a grub boot menu.
Edit the first entry ("Install Fedora" or something) by pressing "e" on your keyboard.
In grub cmdline, remove quiet and add inst.ks=http://XXX.XXX.XXX.XXX:3000/my.cfg.
Now press F10 to start the installation.