can't install services in Docker

We want to run CI/CD for our saltstack formulars. With debian buster it worked fine; now I try it with bookworm and I get some errors. My CI-yaml file in gitlab looks like this:

image: 
  name: debian:bookworm
default:
 before_script:
    - DEBIAN_FRONTEND=noninteractive apt update -qq
    - DEBIAN_FRONTEND=noninteractive apt install -yqq python3-pip pipx curl apt-utils gnupg2 ssh
    - pipx install yamllint
    - pipx install salt-lint
    - pipx ensurepath
    - mkdir -p /etc/apt/keyrings/
    - curl -fsSL https://packages.broadcom.com/artifactory/api/security/keypair/SaltProjectKey/public  | tee /etc/apt/keyrings/salt-archive-keyring.pgp
    - "echo 'deb [signed-by=/etc/apt/keyrings/salt-archive-keyring.pgp arch=amd64] https://packages.broadcom.com/artifactory/saltproject-deb  stable main' > /etc/apt/sources.list.d/saltstack.list"
    - DEBIAN_FRONTEND=noninteractive apt update -qq && DEBIAN_FRONTEND=noninteractive apt install salt-minion -yqq
    - "echo 'file_client: local' >> /etc/salt/minion"
    - "echo -e 'grains:\n  fqdn: test-minion.example.de' >> /etc/salt/minion"
    - "echo -e '  host: test-minion' >> /etc/salt/minion"
    - mkdir -p /srv/salt
    - cp -r $CI_PROJECT_DIR/* /srv/salt
[...]
highstate:
  stage: Test
  needs: ["linux:lint"]
  tags:
    - docker
  script:
    - salt-call state.highstate --id=test-minion.example.de --file-root=/srv/salt/states --pillar-root=/srv/salt/pillars --retcode-passthrough mocked=True --state-output=mixed --state_verbose=True
  only:
    - master

and I get the following error: salt-call state.highstate --id=test-minion.example.de --file-root=/srv/salt/states --pillar-root=/srv/salt/pillars --retcode-passthrough mocked=True --state-output=mixed --state_verbose=True [ERROR ] Command '/usr/bin/systemctl' failed with return code: 1 [ERROR ] stdout: System has not been booted with systemd as init system (PID 1). Can't operate. Failed to connect to bus: Host is down [ERROR ] retcode: 1 [ERROR ] Module function service.systemctl_reload threw an exception. Exception: Problem performing systemctl daemon-reload: System has not been booted with systemd as init system (PID 1). Can't operate. Failed to connect to bus: Host is down [ERROR ] Command 'runlevel' failed with return code: 1 [ERROR ] stdout: unknown [ERROR ] retcode: 1 [ERROR ] Command 'runlevel' failed with return code: 1 [ERROR ] output: unknown [ERROR ] Command 'runlevel' failed with return code: 1 [ERROR ] stdout: unknown [ERROR ] retcode: 1 [ERROR ] Command 'runlevel' failed with return code: 1 [ERROR ] output: unknown [ERROR ] Command 'insserv' failed with return code: 127 [ERROR ] stdout: /bin/sh: 1: insserv: not found [ERROR ] retcode: 127 [ERROR ] Failed when setting service zabbix-agent2 to start at boot, but the service was already running [ERROR ] Command 'service' failed with return code: 1 [ERROR ] stdout: systemd-timesyncd: unrecognized service [ERROR ] retcode: 1 [ERROR ] Command 'service' failed with return code: 1 [ERROR ] stdout: systemd-timesyncd: unrecognized service [ERROR ] retcode: 1 [ERROR ] {'systemd-timesyncd': False} [ERROR ] Command '/usr/sbin/sysctl' failed with return code: 1 [ERROR ] stderr: sysctl: permission denied on key "vm.swappiness" [ERROR ] retcode: 1 [ERROR ] Failed to set vm.swappiness to 5: sysctl -w failed: sysctl: permission denied on key "vm.swappiness" [...] ---------- ID: systemd-salt-minion Function: module.run Name: service.systemctl_reload Result: False Comment: Module function service.systemctl_reload threw an exception. Exception: Problem performing systemctl daemon-reload: System has not been booted with systemd as init system (PID 1). Can't operate. Failed to connect to bus: Host is down Started: 14:35:18.642296 Duration: 11.847 ms Changes: ----------