Prive command line tool - default config file

The default value of the configs json is not found if you are not in the correct folder, with the following error:

FileNotFoundError: [Errno 2] No such file or directory: 'prive/configs/config.json'

I think we either need to place the contents of the file in `run.py` or fix the path.

I would propose the former as it is simpler?
