Can't run newsbeuter in docker

[schvabodka-man]

Hi there! I'm attempting on running newsbeuter on docker and getting error.

Newsbeuter version (copy from newsbeuter -v):
2.9.5
Steps to reproduce the issue:

1. Get docker image with ubuntu and install newsbeuter
2. Try to launch newsbeuter
3. Get
   Error: an instance of newsbeuter is already running (PID: 0)
   Other info you think is relevant:
   In fact newsbeuter isn't running. ps doesn't show that there are any running instances of newsbeuter.

[Minoru]

Hi!

Please run with --log-level=6 --log-file=newsbeuter.log and post the resulting log. (Gist is awesome.)