Run a web application.

    :param cls: Application class
    :param routes: list of routes
    :param args: additional arguments
    :param kwargs: additional keyword arguments
    :return: None

def run(cls, routes, *args, **kwargs): # pragma: no cover
    """
    Run a web application.

    :param cls: Application class
    :param routes: list of routes
    :param args: additional arguments
    :param kwargs: additional keyword arguments
    :return: None
    """

    app = init(cls, routes, *args, **kwargs)

    HOST = os.getenv('HOST', '0.0.0.0')
    PORT = int(os.getenv('PORT', 8000))

    aiohttp.web.run_app(app, port=PORT, host=HOST)