Tools and (above all) reasonable configs to create custom Debian ISO images

The Debian GNU/Linux Installation Guide refers to preseeding as a "way to set answers to questions asked during the installation process, without having to manually enter the answers". This provides for a method to automate installations as much as possible: almost zero-click!
The process starts by means of two files included in this repository:

1. preseed_cfg.tmpl: a reasonably complete preseed file, see an example here, which must be customized through...
2. dicustomizer.sh: an interactive Bash script which asks questions, such as hostname, IP address, and will produce the actual preseed.cfg file

1. Set up the directory structure

$ ./preseed_init.sh -d .
[+] Creating/updating hierarchy in directory '.'
[!] Directory . already exists, skipping...
[+] NEW directory ./destination_iso created, OK
[+] NEW directory ./source_iso created, OK
[+] NEW directory ./workdir created, OK
[+] NEW directory ./loopdir created, OK

2. Download the source ISO file

$ curl -sSLfO https://cdimage.debian.org/debian-cd/current/amd64/iso-cd/debian-12.4.0-amd64-netinst.iso

$ mv debian-12.4.0-amd64-netinst.iso source_iso/

3. Generate the customized preseed.cfg

$ ./dicustomizer.sh

4. Finally, create the customized ISO

$ sudo ./mkiso_preseed.sh

NOTE: root credentials needed

• https://wiki.debian.org/DebianInstaller/Preseed
• https://wiki.debian.org/DebianInstaller/Preseed/EditIso