Switch mode to debian

[meisenzahl]

Related to #252

I had to dig through the code of live-build to find out that the versions of Debian and Ubuntu are implemented differently. By using debian:latest to build our images, the mode ubuntu is not supported. Only security repositories are enabled for mode debian: https://salsa.debian.org/live-team/live-build/-/blob/master/functions/sourcelist.sh#L77

Before

deb mirror://mirrors.ubuntu.com/mirrors.txt jammy main restricted universe multiverse
deb-src mirror://mirrors.ubuntu.com/mirrors.txt jammy main restricted universe multiverse
deb mirror://mirrors.ubuntu.com/mirrors.txt jammy-updates main restricted universe multiverse
deb-src mirror://mirrors.ubuntu.com/mirrors.txt jammy-updates main restricted universe multiverse

After

deb mirror://mirrors.ubuntu.com/mirrors.txt jammy main restricted universe multiverse
deb-src mirror://mirrors.ubuntu.com/mirrors.txt jammy main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse
deb-src http://security.ubuntu.com/ubuntu/ jammy-security main restricted universe multiverse
deb mirror://mirrors.ubuntu.com/mirrors.txt jammy-updates main restricted universe multiverse
deb-src mirror://mirrors.ubuntu.com/mirrors.txt jammy-updates main restricted universe multiverse

[davidmhewitt]

Well spotted. Have you built a working image with this config?

There's a couple of other things affected by changing this, but I don't think they look significant:

https://salsa.debian.org/search?search=LB_MODE&nav_source=navbar&project_id=11221&group_id=2761&search_code=true&repository_ref=master

[meisenzahl]

Yes, I have built a working image with this config. I was able to install it without any problems and have not noticed any limitations from the change so far.