docs: def create_project_configuration(filename):
      """Create a project configuration file which contains a configuration
         that might make sense."""
      home = os.path.expanduser("~")
      project_root_folder = os.path.join(home, "hwr-experiments")
      config = {'root': project_root_folder,
                'nntoolkit': None,
                'dropbox_app_key': None,
                'dropbox_app_secret': None,
                'dbconfig': os.path.join(home, "hwrt-config/db.config.yml"),
                'data_analyzation_queue': [{'Creator': None}],
                'worker_api_key': '1234567890abc',
                'environment': 'development'}
      with open(filename, 'w') as f:
          yaml.dump(config, f, default_flow_style=False)