How to use the dockerflow.sanic.Dockerflow function in dockerflow

def test_instantiating(app):
    dockerflow = Dockerflow()
    assert "dockerflow.heartbeat" not in app.router.routes_names
    dockerflow.init_app(app)
    assert "dockerflow.heartbeat" in app.router.routes_names

def test_version_path(app, mocker, test_client, version_content):
    custom_version_path = "/something/extra/ordinary"
    dockerflow = Dockerflow(app, version_path=custom_version_path)
    version_callback = mocker.patch.object(
        dockerflow, "_version_callback", return_value=version_content
    )
    _, response = test_client.get("/__version__")
    assert response.status == 200
    assert response.json == version_content
    version_callback.assert_called_with(custom_version_path)

def dockerflow(app):
    return Dockerflow(app)

def dockerflow_redis(app):
    app.config["REDIS"] = {"address": "redis://:password@localhost:6379/0"}
    return Dockerflow(app, redis=SanicRedis(app))

def init_app(app: Sanic, q: SQLiteAckQueue) -> Dockerflow:
    """Initialize Sanic app with dockerflow apis."""
    dockerflow = Dockerflow()
    dockerflow.check(name="check_disk_bytes_free")(
        partial(check_disk_bytes_free, app=app, q=q)
    )
    dockerflow.check(name="check_queue_size")(partial(check_queue_size, q=q))
    dockerflow.init_app(app)