version: '3.9'
services:
  app-1:
    image: node-app:v1
    ports:
      - "3001:3000"
    networks:
      -  app-network
    environment:
      - INSTANCE_NAME=app-1

  app-2:
    image: node-app:v1
    ports:
      - "3002:3000"
    networks:
      -  app-network
    environment:
      - INSTANCE_NAME=app-2

  app-3:
    image: node-app:v1
    ports:
      - "3003:3000"
    networks:
      -  app-network
    environment:
      - INSTANCE_NAME=app-3


  nginx:
    image: nginx:alpine
    ports:
      - "80:80"
    volumes:
      - ./files/nginx.conf:/etc/nginx/nginx.conf:ro
    networks:
      - app-network
      

networks:
  app-network:
    driver: bridge