Cleanup previous executions.

[bmustiata]

Cleanup previous executions before the start, so people can run docker stop and docker start on the containers.

[suchja]

Thanks for your contribution!

I'm no expert on X11, but do you think it is a good idea to remove logs and locks automatically when starting the container?
What happens, if there were some problems in the last run? There is no chance to debug it, when no information is available.

[bmustiata]

You can export your container as a tar file if you're that curious. The problem that I have right now is that the container is not starting at all, so anyway I don't have a chance to debug it. After calling docker stop I can't restart it with docker start, I need to recreate the container from scratch.

Maybe an option would be to move them into a folder, but that yields other issues, such as log rotation, etc.