QuantumBNG Baremetal Quick Start

Audience: the operator installing QuantumBNG for the first time.
Time budget: ~30 minutes from a fresh Ubuntu 24.04 box to a working BNG serving DHCP leases.
Assumes: shell access to the box (SSH or console), root/sudo, a working management NIC on the LAN.

If you want the full manual instead — every panel, every setting, every operator task — see user-guide.md. This document is the "get it running" script; that one is the reference.