[happymellon]

> Another example would be for browser testing via chromedriver.

That shouldn't be in your master image. Put your application in a container, and either just run your browser tests and point it at your dev/test/prod deployment, or build a second image with Chrome driver and the test scripts and point it at your deployed application.

Doesn't need to be multi-layer, and it doesn't need to be complex. You have essentially two apps here.