| 123456789101112131415161718192021222324252627282930 | version: '3'services:  redis:    image: redis:alpine    ports:      - "6379:6379"  db:    image: postgres:9.4    environment:      POSTGRES_USER: "postgres"      POSTGRES_PASSWORD: "postgres"    ports:      - "5432:5432"  vote:    image: dockersamples/examplevotingapp_vote:before    ports:      - "5000:80"    deploy:      replicas: 1  result:    image: dockersamples/examplevotingapp_result:before    ports:      - "5001:80"  worker:    image: dockersamples/examplevotingapp_worker  visualizer:    image: dockersamples/visualizer:stable    ports:       - "8080:8080"
 |