Invalid type error in Docker Compose

Did you try with quotes on ports?

version: '2'

services:
  api:
    build:
      context: .
      dockerfile: webapi/dockerfile
    ports:
       - 210
  web:
    build:
      context: .
      dockerfile: app/dockerfile
    ports:
      - 80
  lbapi:
    image: dockercloud/haproxy
    links:
       – api
    ports:
       – "8080:210"
  lbweb:
    image: dockercloud/haproxy
    links:
       – web
    ports:
       – "80:80"