(Yes, the project is still alive 😃) This procedure shows how to create a bootable and installable Ubuntu Live (along with the automatic hardware detection and configuration) from scratch.
If the user does not specify any DEBIAN_FRONTEND variable, they'll get the same behavior that they got without this.
But if they do specify a DEBIAN_FRONTEND variable in the build system, with the primary use case being DEBIAN_FRONTEND=noninteractive, then it will get populated into the chroot, allowing for a non-interactive build.
DEBIAN_FRONTENDvariable, they'll get the same behavior that they got without this.DEBIAN_FRONTENDvariable in the build system, with the primary use case beingDEBIAN_FRONTEND=noninteractive, then it will get populated into the chroot, allowing for a non-interactive build.