fixup! Fixup

README.md

@@ -250,9 +250,11 @@ Jobs can depend on each other. We'll now create a workflow that builds, then dep
 
 1. Modify the `deploy.yml` to make it reusable by adding a `workflow_call` trigger. It should have the same inputs as the `workflow_dispatch` trigger.
 
-2. Modify your reusable build action to propagate outputs. You'll need to add an `id: build-push` to the step that builds the image. Then, you can add an `outputs` object property to the job and the workflow. You should use the `metadata["image.name"]` and `digest` outputs from the build-push action as `imageName` and `digest` respectively.
+2. Modify your reusable build action to propagate outputs. You'll need to add an `id: build-push` to the step that builds the image. Then, you can add an `outputs` object property to the job and the workflow.
 
-    Take a look at [the documentation](https://docs.github.com/en/actions/using-workflows/reusing-workflows#using-outputs-from-a-reusable-workflow) for a complete example.
+    To get the correct outputs from the `docker/build-push-action` action, you should use `fromJson(jobs.build.outputs.metadata)['image.name']` and `jobs.build.outputsdigest` outputs from the build-push action as `imageName` and `digest` respectively. You can read more about the `fromJson` expression in [the documentation](https://docs.github.com/en/actions/learn-github-actions/expressions#fromjson).
+
+    Take a look at [the documentation](https://docs.github.com/en/actions/using-workflows/reusing-workflows#using-outputs-from-a-reusable-workflow) for a complete example of outputs for a reusable workflow.
 
 3. Expand your (non-reusable) build workflow with a couple of more jobs: `deploy-test` and `deploy-production`. These jobs should reuse the `deploy.yml` workflow, use `imageName` and `digest` outputs from the `build` job and use correct environments. You have to specify `needs` for the deploy jobs, take a look at [the `needs` context and corresponding example](https://docs.github.com/en/actions/learn-github-actions/contexts#example-usage-of-the-matrix-context).