new_contents: from gevent.wsgi import WSGIServer
  from PhoenixNow.config import ProductionConfig, DevelopmentConfig
  from PhoenixNow.factory import create_app, extensions
  import os
  
  if os.environ.get('FLASK_DEBUG'):
      app = extensions(create_app(DevelopmentConfig))
  else:
      app = extensions(create_app(ProductionConfig))
  
  http_server = WSGIServer(('', 5000), app)
  http_server.serve_forever()
subject: Switch to gevent