- Enhanced check_systemd() function to properly detect container environments
- Added detection for Docker, Podman, and other container runtimes
- Verify systemd is running as PID 1 before attempting service operations
- Check systemd D-Bus availability before service configuration
- Gracefully skip systemd setup in containers with helpful messages
- Provide manual configuration instructions for real systems
Fixes container builds and CI/CD pipelines that install apt-ostree
while maintaining full functionality on real systems with systemd.
