Sandbox image

A sandbox image defines what code sees when it runs in a sandbox: a Linux userland, language runtimes, package managers, preinstalled tools, environment variables, and a working directory.

A sandbox image defines the environment that code sees when it runs in a sandbox. The contents are a Linux userland, language runtimes, package managers, preinstalled tools, environment variables, and a working directory. An image is typically built from a Dockerfile or declaratively through the SDK. Many platforms offer a default general-purpose image and a way to define custom images. The sandbox daemon also runs inside this environment, where it carries out the instructions of the platform.