feat: Phase 3 manufacturing + firmware management

docker-compose.yml

@@ -8,6 +8,7 @@ services:
       # Persistent data - lives outside the container
       - ./data/mqtt_data.db:/app/mqtt_data.db
       - ./data/built_melodies:/app/storage/built_melodies
+      - ./data/firmware:/app/storage/firmware
       - ./data/firebase-service-account.json:/app/firebase-service-account.json:ro
     ports:
       - "8000:8000"
@@ -26,7 +27,7 @@ services:
     image: nginx:alpine
     container_name: bellsystems-nginx
     ports:
-      - "80:80"
+      - "${NGINX_PORT:-80}:80"
     volumes:
       - ./nginx/nginx.conf:/etc/nginx/nginx.conf:ro
     depends_on: