> ## Documentation Index
> Fetch the complete documentation index at: https://developer.upsun.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Image properties

> Details about image properties in the Upsun Cloud config.yaml file

**Note:** The properties below are available in **both** [single-runtime image](https://developer.upsun.com/docs/configure-apps/app-reference/single-runtime-image.md) and [composable image](https://developer.upsun.com/docs/configure-apps/app-reference/composable-image.md) types.

For most of these properties, the syntax and details are the same for both image types. Differences in meaning and syntax are noted as needed for each property.

> [!NOTE]
>
> To learn about the properties that are **unique to each image type**, refer to the top-level properties described in the [single-runtime image](https://developer.upsun.com/docs/configure-apps/app-reference/single-runtime-image.md) topic or the primary application properties described in the [composable image](https://developer.upsun.com/docs/configure-apps/app-reference/composable-image.md) topic.

Pick a property to jump to its reference:

> [card] [access](https://developer.upsun.com/docs/configure-apps/image-properties/access.md)
>
> Access & Security

> [card] [additional\_hosts](https://developer.upsun.com/docs/configure-apps/image-properties/additional_hosts.md)
>
> Networking

> [card] [authorizations](https://developer.upsun.com/docs/configure-apps/image-properties/authorizations.md)
>
> Access & Security

> [card] [container\_profile](https://developer.upsun.com/docs/configure-apps/image-properties/container_profile.md)
>
> Networking

> [card] [crons](https://developer.upsun.com/docs/configure-apps/image-properties/crons.md)
>
> Runtime

> [card] [hooks](https://developer.upsun.com/docs/configure-apps/image-properties/hooks.md)
>
> Build & Deploy

> [card] [mounts](https://developer.upsun.com/docs/configure-apps/image-properties/mounts.md)
>
> Storage & Data

> [card] [relationships](https://developer.upsun.com/docs/configure-apps/image-properties/relationships.md)
>
> Relationships

> [card] [source](https://developer.upsun.com/docs/configure-apps/image-properties/source.md)
>
> Build & Deploy

> [card] [variables](https://developer.upsun.com/docs/configure-apps/image-properties/variables.md)
>
> Storage & Data

> [card] [web](https://developer.upsun.com/docs/configure-apps/image-properties/web.md)
>
> Runtime

> [card] [workers](https://developer.upsun.com/docs/configure-apps/image-properties/workers.md)
>
> Runtime


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