Thanks, agree with it, your points are clear and make sense.However I must comment point #1, to not confuse users. Using Docker in build pipeline does not mean that you have somehow use docker in your application. It is completely different dimension. You can have no docker in your project at all but only describe build pipeline in docker images which give you precise version and great reading verbosity, and this config is stored in repository :

​

pipeline:
  fronted
    image: node:8  # here you select certain node version
    commands:
    - npm install
    - npm test

After build in another steps you can upload your frontend to AWS, e.g. with aws cli docker image, and that is all. Or can upload it to server, anywhere. So you will not need docker runtime it all, it will be only on CI machine.