def run_uvicorn_backend(host: str, port: int, loglevel: LogLevel):
    """Run the backend in development mode using Uvicorn.

    Args:
        host: The app host
        port: The app port
        loglevel: The log level.
    """
    import uvicorn

    uvicorn.run(
        app=f"{get_app_instance()}",
        factory=True,
        host=host,
        port=port,
        log_level=loglevel.value,
        reload=True,
        reload_dirs=list(map(str, get_reload_paths())),
        reload_delay=0.1,
    )
Run the backend in development mode using Uvicorn.

    Args:
        host: The app host
        port: The app port
        loglevel: The log level.
    
reflex/utils/exec.py