nginx-basic-lb/compose.yaml

version: '3.4'
services:
  lb:
    build: .
    environment:
      - APP_PORT=2001
      - APP_NAME=whoami
    ports:
      - "8081:80"

  whoami:
    image: traefik/whoami
    command:
      # It tells whoami to start listening on 2001 instead of 80
      - --port=2001