Similar to https://issues.jenkins-ci.org/browse/JENKINS-41668

I'm unable to point Jenkins to my custom dockerfile named "Docker.build". I dont' want to put it in separate directory as it needs to be on top-level to catch some files with COPY and ADD commands.

Ideally i'd be able to do something like:

agent {
  dockerfile {
   name 'Dockerfile.build'
  }
}