Setup difficulties + remedies

[invokermain]

Currently has taken me a few hours to set up and make this exporter work. Two issues with the set up:

1. It is non-obvious that the image will copy example jobs into the container and try and run them if you use the default script location. This behaviour seems to serve no benefit.

2. It is non-obvious that having labels is a must, go will throw a vague error if you only return results from your .sh script. Unsure what the behaviour of passing "-labels" without any argument is.

This behaviour should really either be documented properly or should be fixed in the code.

Other than that nice project.