Docker compose

services:
  parc-stub:
    build:
      context: .
    container_name: parc-stub
    restart: unless-stopped
    networks:
      - parc-net
    ports:
      - "5001:5000"                 # Web UI → http://localhost:5001
    volumes:
      - ../mosquitto/server-certs/ca.crt:/certs/ca.crt:ro
      - ../mosquitto/stub-certs/stub.crt:/certs/client.crt:ro
      - ../mosquitto/stub-certs/stub.key:/certs/client.key:ro
      - parc-stub-data:/data              # persists config.json across restarts
    environment:
      MQTT_HOST: mosquitto
      MQTT_PORT: "8883"
      CONFIG_PATH: /data/config.json
    logging:
      driver: json-file
      options:
        max-size: "5m"
        max-file: "3"

networks:
  parc-net:
    external: true                  # already declared in your main compose

volumes:
  parc-stub-data:                   # config.json persisted here