Create a builder

A builder is an OCI image with all the inputs needed for a buildpacks build, including the build-time base image, a reference to a runtime base image, a lifecycle, and a set of buildpacks.

• Create a build base image

• Create a run base image

• Putting it all together

• Specify an image extension in a builder

Declare source metadata

Declare information about application source code, to be included as metadata in the application image.

Specify the build time environment variables

Environment variables are used to configure buildpack behavior. They may be specified by:

• The platform operator (this page)
• The end user (see Customize buildpack behavior with build-time environment variables)
• Other buildpacks (see Specify the environment)

Create a stack (deprecated)

A stack is the grouping together of the build and run base images, represented by a unique ID.

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