docker-compose.yml

version: '3'
services:

  node1:
    container_name: node1
    build: .
    volumes:
      - .:/app
    ports:
      - "3001:3001"
    environment:
      - HTTP_HOST=0.0.0.0
      - DEBUG=app*
    tty: true
    command: /app/node_modules/.bin/nodemon src/index.js

  node2:
    container_name: node2
    build: .
    volumes:
      - .:/app
    ports:
      - "3002:3001"
    environment:
      - PEERS=ws://node1:6001
      - HTTP_HOST=0.0.0.0
      - DEBUG=app*
    links:
      - node1
    depends_on:
      - node1
    tty: true
    command: /app/node_modules/.bin/nodemon src/index.js

  node3:
    container_name: node3
    build: .
    volumes:
      - .:/app
    ports:
      - "3003:3001"
    environment:
      - PEERS=ws://node1:6001,ws://node2:6001
      - HTTP_HOST=0.0.0.0
      - DEBUG=app*
    links:
      - node1
      - node2
    depends_on:
      - node1
      - node2
    tty: true
    command: /app/node_modules/.bin/nodemon src/index.js