Werkzeug web server is not designed to run in production

Reported by @loic.huder

Works with

Flask-SocketIO==5.2.0

but fails with

Flask-SocketIO==5.3.0

Traceback (most recent call last):
  File "/home/server/ewoks_backend/venv/bin/ewoks-server", line 33, in <module>
    sys.exit(load_entry_point('ewoksserver', 'console_scripts', 'ewoks-server')())
  File "/home/server/ewoks_backend/ewoksserver/src/ewoksserver/server.py", line 185, in main
    run_app(app, socketio=socketio, port=args.port)
  File "/home/server/ewoks_backend/ewoksserver/src/ewoksserver/server.py", line 113, in run_app
    socketio.run(app, port=port)
  File "/home/server/ewoks_backend/venv/lib/python3.8/site-packages/flask_socketio/__init__.py", line 639, in run
    raise RuntimeError('The Werkzeug web server is not '
RuntimeError: The Werkzeug web server is not designed to run in production. Pass allow_unsafe_werkzeug=True to the run() method to disable this error.

Caused by this MR:

https://github.com/miguelgrinberg/Flask-SocketIO/pull/1877