Update example to include using the built image

Signed-off-by: Taylor Silva <tsilva@pivotal.io>

pipelines/build-and-push-simple-image.yml

@@ -31,16 +31,24 @@ jobs:
         type: registry-image
         source:
           # Check out the README for oci-build-task at
-          # https://github.com/vito/oci-build-task
-          repository: vito/oci-build-task
+          # https://github.com/concourse/oci-build-task
+          repository: concourse/oci-build-task
       inputs:
       - name: concourse-examples
       outputs:
       - name: image
       params:
         CONTEXT: concourse-examples/Dockerfiles/simple
+        UNPACK_ROOTFS: "true" # only needed if using image in a future step
       run:
         path: build
+  - task: use-built-image-in-task
+    image: image
+    config:
+      platform: linux
+      run:
+        path: cat
+        args: ["/stranger"]
   - put: simple-image
     params:
       image: image/image.tar