Server mints a dedicated admin API key on first boot (persisted plaintext
encrypted in setup_state.extras) and POSTs a bf-server-config node into
Node-RED's flow graph via /nrdp/flows. Idempotent — skips if any
bf-server-config already exists, so user-owned configs win.
New admin-http config 'selfUrl' (defaults to http://127.0.0.1:18080)
tells Node-RED how to reach the BF server. Docker compose sets it to
http://server:18080 so requests stay inside the compose network.
Bind native backend services and Node-RED to loopback so Angie remains the public auth boundary. Keep Docker on an internal compose network and stop kiosk fallback to a layout when display default is none.