Containers, originally designed for cloud environments, are increasingly popular for provisioning workers outside the cloud, for example in mobile and edge computing. These settings, however, bring new challenges: high latency links, limited bandwidth, and resource-constrained workers. The result is longer provisioning times when deploying new workers or updating existing ones, much of it due to network traffic. Starlight is an accelerator for container provisioning. Starlight decouples provisioning from development by redesigning the container deployment protocol, filesystem, and image storage format. Starlight deploys and starts containers 3.0× faster than the current state-of-the-art implementation while incurring no runtime overhead and little storage overhead. It is backwards compatible with existing workers and standard container registries.