<!-- Enhancements in a specification are not always easy to describe at first glance, requiring some discussions with other groups before reaching a conclusion. Because of this, we kindly ask you to consider opening a discussion using the "Discussions" tab. The community will be more than happy to discuss your enhancement proposal there. If you see a typo, spelling error, or formatting issue in our docs, please open a PR. --> **What would you like to be added**: Add a property to configure the lifetime of spawned containers. **Why is this needed**: Gives authors the ability to decide whether or not to delete containers after executing them, and to eventually define their Time To Live.