mount
open override fun mount(configure: LiberatorContainerExtension.Config.() -> Unit): LiberatorContainerExtension.Liberator(source)
Starts the container (if not already running) and returns a Liberator handle.
For a DefaultContainerConfig, any configured extra files, before-script and adapter config are copied into the container before it is started. Subsequent calls return the same handle without restarting the container.