1229902 - Allow docker-worker features to adjust the dockerConfig

Status: RESOLVED WONTFIX

(Taskcluster :: Workers, defect)

Description

[Dustin J. Mitchell [:dustin] (he/him)]

There's some special-casing for the `interactive` feature, and I'm about to add more for the ptrace feature.  It would be nice if a feature could hook into the states in such a way as to modify the dockerConfig before it's passed to DockerProc.

I looked at fixing this myself, but the states don't make a lot of sense -- the `created` function appears to be called well before the container is actually created, and anyway it doesn't make much sense to add an additional state for this transition.  But it feels weird for `created` to somehow return parameters that would affect the creation of the container.