Compose: Invalid type in volume, it should be a string.

Trying to setup a bind volume and it does not work:

Followed the documentation to write the docker-compose file:

version: '3'
services:
  web:
    #build: .
    image: fnndsc/fnndsc.babymri.org
    ports:
      - "8060:8080"
    volumes:
      - type: bind
        source: .
        target: /src/website
    labels:
      name: "FNNDSC Web App"
      role: "FNNDSC Web App development server"

Docker version 17.03.1-ce, build c6d412e

docker-compose version 1.12.0, build b31ff33

docker-compose up:

ERROR: The Compose file './docker-compose.yml' is invalid because:
services.web.volumes contains an invalid type, it should be a string