docker-compose.yml

version: '3'

x-client-app: &client-app
  build: .
  command: 'npm run start:client'
  environment:
    - SERVICE_NAME=backend-client
    - PORT=3000
    - REDIS_HOST=redis
    - REDIS_PORT=6379
    - SERVER_URL=http://backend-server:3000/api
  expose:
    - 3000
  networks:
    - example-2
  depends_on:
    - redis
  deploy:
    resources:
      limits:
        cpus: '0.5'
        memory: 128M

services:

  backend-client-node-1:
    <<: *client-app
    ports:
      - 3001:3000

  backend-client-node-2:
    <<: *client-app
    ports:
      - 3002:3000

  backend-client-node-3:
    <<: *client-app
    ports:
      - 3003:3000

  backend-server:
    build: .
    command: 'npm run start:server'
    environment:
      - SERVICE_NAME=backend-service
      - PORT=3000
    expose:
      - 3000
    networks:
      - example-2
    deploy:
      resources:
        limits:
          cpus: '0.5'
          memory: 128M

  redis:
    image: redis:alpine
    hostname: redis
    ports:
      - "6379:6379"
    networks:
      - example-2


networks:
  example-2: