Initial: RPi Docker Compose stack

- Mosquitto MQTT broker
- Zigbee2MQTT with BLZ dongle (ThirdReality, BL702, Pine64 fork)
- Node-RED 5.0 with dashboard
- justfile for remote management

zigbee2mqtt.yaml

@@ -0,0 +1,15 @@
+version: 5
+mqtt:
+  base_topic: zigbee2mqtt
+  server: mqtt://mosquitto:1883
+serial:
+  port: /dev/ttyUSB0
+  adapter: blz
+  baudrate: 2000000
+  rtscts: false
+advanced:
+  log_level: debug
+frontend:
+  enabled: true
+  port: 8080
+permit_join: true