Docker-compose haproxy

• https://blog.hypriot.com/post/docker-compose-nodejs-haproxy/
• https://www.baeldung.com/ops/docker-compose-expose-vs-ports
• https://www.baeldung.com/ops/docker-compose-expose-vs-ports

https://hub.docker.com/_/haproxy

weba:
  build: .
  expose:
    - 80

webb:
  build: .
  expose:
    - 80

webc:
  build: .
  expose:
    - 80

haproxy:
  image: hypriot/rpi-haproxy
  volumes:
   - haproxy:/haproxy-override
  links:
   - weba
   - webb
   - webc
  ports:
   - "80:80"
   - "70:70"

  expose:
   - "80"
   - "70"