By default, containers are serverless, which means your applications will shut off automatically when they’re not being used. You can control how long your containers are kept alive by using the keep_warm_seconds flag in your deployment trigger. For example, by adding a keep_warm_seconds=300 argument to an endpoint, your app will stay running for 5 minutes before shutting off: 
from beta9 import endpoint


# Container stays alive for 5 min before shutting down automatically
@endpoint(keep_warm_seconds=300)
def handler():
    return {}