Run Docker Compose as a Linux Service with systemd

To run Docker Compose as a Linux service with systemd, you need to create a systemd unit file to manage the service. This allows the service to start on boot, stop cleanly on shutdown, and survive reboots. This setup is suitable for small self-hosted applications, internal tools, and staging environments, but not for complex multi-host workloads. To implement this, separate project files from the systemd unit and persistent data, and use a clean setup.