config = {
    'host': '0.0.0.0',
    'port': 5001,
    'debug': True,
    'backend_url': '127.0.0.1:5000'
}

config = {
    'host': '0.0.0.0',
    'port': 5000,
    'debug': True,
    'backend_url': '127.0.0.1:5000'
}

delete config.py in frontend