| 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354 | version: "3"services:  vote:    build: ./vote    command: python app.py    volumes:     - ./vote:/app    ports:      - "5000:80"    networks:      - front-tier      - back-tier  result:    build: ./result    command: nodemon server.js    volumes:      - ./result:/app    ports:      - "5001:80"      - "5858:5858"    networks:      - front-tier      - back-tier  worker:    build:      context: ./worker      dockerfile: Dockerfile.j    networks:      - back-tier  redis:    image: redis:alpine    container_name: redis    ports: ["6379"]    networks:      - back-tier  db:    image: postgres:9.4    container_name: db    volumes:      - "db-data:/var/lib/postgresql/data"    networks:      - back-tiervolumes:  db-data:networks:  front-tier:  back-tier:
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