_application_container_config.html.md.erb

1. Select **Application Containers**.

	<%= image_tag("../images/er-config-app-containers.png") %>

1. The **Enable Custom Buildpacks** checkbox governs the ability to pass a custom buildpack URL to the `-b` option of the `cf push` command. By default, this ability is enabled, letting developers use custom buildpacks when deploying apps. Disable this option by disabling the checkbox. For more information about custom buildpacks, refer to the [buildpacks](../buildpacks/) section of the PCF documentation.

1. The **Allow SSH access to app containers** checkbox controls SSH access to application instances. Enable the checkbox to permit SSH access across your deployment, and disable it to prevent all SSH Access. See [Application SSH Overview](../devguide/deploy-apps/app-ssh-overview.html) for information on SSH access permissions at the space and app scope.

1. You can configure Elastic Runtime to run app instances in Docker containers by supplying their IP address range(s) in the **Private Docker Insecure Registry Whitelist** textbox. See the [Using Docker Trusted Registries](../opsguide/docker-registry.html) topic for more information.

1. Select your preference for **Docker Images Disk-Cleanup on Cell VMs**. If you choose **Clean up disk-space once threshold is reached**, enter a **Threshold of Disk-Used** in megabytes. 

1. Click **Save**.