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Note: The properties below are available in both single-runtime image and composable image 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.
To learn about the properties that are unique to each image type, refer to the top-level properties described in the single-runtime image topic or the primary application properties described in the composable image topic.
Pick a property to jump to its reference:

access

Access & Security

additional_hosts

Networking

container_profile

Networking

crons

Runtime

hooks

Build & Deploy

mounts

Storage & Data

relationships

Relationships

source

Build & Deploy

variables

Storage & Data

web

Runtime

workers

Runtime
Last modified on March 16, 2026