# How to Use Container Images for Paperspace Deployments

Paperspace Deployments are containers-as-a-service that allow you to run container images and serve machine learning models using a high-performance, low-latency service with a RESTful API.

Container images are required to run a Paperspace App. Gradient deployments support images from both public and private container registries. [Private registry connections](https://docs.digitalocean.com/products/paperspace/deployments/how-to/manage-containers/index.html.md) must be established before the deployment is started and can be created in the Paperspace web console.

When a replica is spinning up, the image is pulled from the specified container registry and started on the machine type specified in the deployment spec.

```yaml
  image: paperspace/app-fixture:0.1.3
  containerRegistry: my-registry # (optional) name of the container registry to use for the app.
```