Fixes #27

Furthermore removed the cleanup phase of build-local.sh,
as this is automatically done by docker --rm

Related to #41

As a default password caused some problems and didn't improve the security,
it was now removed. As sudo can now be run without password, the sudoers file
for the setup scripts was also removed.

Fixes #32

Previously the Safe graphics entry was just copy and pasted from the
original grub.cfg and only the normal boot entry was changed to an autoinstall.
Now the safe graphics entry is also changed to an autoinstall one.

Fixes #18

Previously it was enabled at the setup stage, but as the Cleanup script
is always executed later on, we can better put it into the cleanup
to increase our chance of not triggering it before the kid gets it.

Furthermore the command to manually reenable the service was added
to the README, so people can even do it after the cleanup has happened.

Fixes #12

Fixes #25

Inkscape and Telegram Desktop are both available in the
Ubuntu package sources. As we can install those at the
time of the ISO build, we prefer to use these over snaps,
which consume time at the stage of the Setup script execution.

This is just a cleanup step, to tidy up the preseed file a bit.

Because sudo can be used without password, we can switch back
to it and don't need the bashwrapper anymore to execute our setup and
cleanup scripts as root.

As Ubuntu 22.04 doesn't ship the 5.4 kernel anymore, the script cannot
do it's job anymore. Furthremore its usecase might be not valid anymore
due to the kernel updates fixing the original problem.

Fixes #36

Since Thunderbird 78 it has itself an included PGP support.
Due to this, Enigmail does no longer develop the addon for Thunderbird
and it is now only a migration script. Since we install a fresh Ubuntu,
we don't need to migrate old PGP keys and thus Enigmail can be removed.

The Zoom snap doesn't work since Ubuntu 21.10 due to the
switch to the Wayland compositor. Therefore it was removed.
The manually installable deb package from the Zoom website
works fine (but cannot be included by default, as it is not in
the package repository).

Fixes #40

The chroot install seems to not correctly apply the
update-alternatives. Therefore this is fixed in the
setup script.

Without this fix, OBS cannot be started.

As Cheese is currently bugged (see issue #39 and #38), we instead use
guvcview as a replacement. Kamoso was also tested as a replacement,
but crashed on certain computers (in our case on the aspire 7550g).
Cheese was also removed to avoid kids declaring the computer as defect,
because of a bugged webcam image.

This is necessary, as the icon placement has changed
to place the icons by default in the bottom right corner.
Therefore we must change this before the desktop is shown
to avoid having to move the home icon manually to the top left corner.

Fixes #37

Executable bash scripts are no longer executed on the desktop.
Therefore we use Desktop files to run these scripts.
To trust those desktop files, an autostart script was added
to automatically trust them on the first boot.

Fixes #34

Icon-Sources (both licensed under the Public Domain):
- Setup: https://commons.wikimedia.org/wiki/File:Media-floppy.svg
- Cleanup: https://commons.wikimedia.org/wiki/File:Broom_icon_1.svg

This helps when developing the image, as you don't always need a full
build. Therefore you can just rerun the last n steps required to
get a new ISO file. Scripts will always first clean up their possible
previous execution, before rerunning. This allows scripts to be run multiple
times in a row to quickly fix a bug in a script.

- Removed fakeroot, as we are already root
- Copied /etc/passwd and /etc/group to the chroot to fix apt installation problems
- Fixed the ISO build process, as it now doesn't use isolinux anymore

Fixes #35

Bumped the the base ISO file and the docker
build container to Ubuntu 22.04 (jammy).

Merge branch '29-setup-sh-beim-ersten-boot-automatisch-starten' of https://gitli.stratum0.org/heyalter/heyalter-ubuntu-iso into 29-setup-sh-beim-ersten-boot-automatisch-starten

# Conflicts:
#	changelog.md

Merge branch 'master' into 31-please-remove-the-installation-medium-then-press-enter-meldung-entfernen

# Conflicts:
#	files/grub.cfg

Merge branch 'master' into 31-please-remove-the-installation-medium-then-press-enter-meldung-entfernen