docker-compose.yml

version : '3'

services:
    lb:
        image: haproxy
        ports:
            - "8080:8080"
        volumes:
            - ./haproxy:/usr/local/etc/haproxy
    ws1:
        build: 
            context: .
            dockerfile: Dockerfile
            args:
                NODE_ENV: development
        volumes:
            - ./:/app
            - /app/node_modules
        environment:
            - APPID=1111
    ws2:
        build: 
            context: .
            dockerfile: Dockerfile
            args:
                NODE_ENV: development
        volumes:
            - ./:/app
            - /app/node_modules
        environment:
            - APPID=2222
    ws3:
        build: 
            context: .
            dockerfile: Dockerfile
            args:
                NODE_ENV: development
        volumes:
            - ./:/app
            - /app/node_modules
        environment:
            - APPID=3333
    ws4:
        build: 
            context: .
            dockerfile: Dockerfile
            args:
                NODE_ENV: development
        volumes:
            - ./:/app
            - /app/node_modules
        environment:
            - APPID=4444
    rds:
        image: redis