Docker for ember cli 2.6.2 and node 10.16.2, what's the expected docker-compose.yaml and Dockerfile?

[michaelstokes93]

Have an ember app using ember cli 2.6.2 and node 10.16.2. Trying to use docker and have been referencing https://github.com/danlynn/ember-cli/tree/2.6.2.

Custom Dockerfile required to use a later version of node (10.16.2 rather than 4.2.3)

• Same as https://github.com/danlynn/ember-cli/blob/2.6.2/Dockerfile other than the node version
• docker compose will not reference image but instead the custom Dockerfile

Questions

1. Assumably the only difference to the https://github.com/danlynn/ember-cli/blob/2.6.2/Dockerfile would be the node version?
2. What's the expected docker-compose.yaml? https://github.com/danlynn/ember-cli/tree/2.6.2#how-to-use mentions that the docker-compose.yml file should be similar to the following:

ember: &defaults
  image: danlynn/ember-cli:2.6.2 (have to use custom Dockerfile because of greater than node version)
  volumes:
    - .:/myapp

npm:
  <<: *defaults
  entrypoint: ['/usr/local/bin/npm']

bower:
  <<: *defaults
  entrypoint: ['/usr/local/bin/bower', '--allow-root']

server:
  <<: *defaults
  command: server --watcher polling
  ports:
    - "4200:4200"
    - "35729:35729" 

As far as I'm aware, that's not a valid docker-compose.yaml file but I don't know what's expected?

Thanks for your help!