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Merge pull request #359 from favonia/document-annotations

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docs(README): add a hint about multi-arch builds
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David Karlsson 2023-11-30 15:35:34 +01:00 committed by GitHub
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@ -954,9 +954,17 @@ The same can be done with the [`bake-action`](https://github.com/docker/bake-act
targets: build
```
If you want to set specific level(s) for your annotations, you can use the
Note that annotations can be attached at many different levels within a manifest.
By default, the generated annotations will be attached to image manifests,
but different registries may expect annotations at different places;
a common practice is to read annotations at _image indexes_ if present,
which are often used by multi-arch builds to index platform-specific images.
If you want to specify level(s) for your annotations, you can use the
[`DOCKER_METADATA_ANNOTATIONS_LEVELS` environment variable](#environment-variables)
with a comma separated list of levels (defaults to `manifest`):
with a comma separated list of all levels the annotations should be attached to (defaults to `manifest`).
The following configuration demonstrates the ability to attach annotations to both image manifests and image indexes,
though your registry may only need annotations at the index level. (That is, `index` alone may be enough.)
Please consult the documentation of your registry.
```yaml
-