Ask HN: PhantomJS or Protractor?

I'm building a framework that can be used to automate financial tasks like transferring money, paying bills, recurring donation, and alerting of irregularities. Think Mint or Check except it runs on your own machine and where a community of devs can add integrations with sites that don't provide API's.

Anyways, for debugging convenience I'm using Protractor but ultimately I don't know how feasible Protractor will be when it comes time to dockerize the server stack on a minimal linux distro.

The PhontomJS binary is going to be easier to manage in the long run, but while I'm working out the kinks I want the comfort of a headed browser.

What should I do?