Revert "Try using cloud native buildpack"

This reverts commit d6c640d.

.github/workflows/starter.yaml

@@ -16,7 +16,6 @@ jobs:
       environment: ${{ steps.get_environment_from_git_ref.outputs.environment }}
       environment_short: ${{ steps.get_environment_from_git_ref.outputs.environment_short }}
       image_name: nuxt-vicav
-      source_image: nuxt-vicav/source
       registry_root: ghcr.io/${{ github.repository }}/
       default_port: "3000"
       fetch-depth: 10
@@ -134,14 +133,13 @@ jobs:
         generate_workflow_vars_tunocent,
         generate_workflow_vars_shawi,
       ]
-    uses: acdh-oeaw/gl-autodevops-minimal-port/.github/workflows/build-cnb-and-push-to-registry.yaml@main
+    uses: acdh-oeaw/gl-autodevops-minimal-port/.github/workflows/build-herokuish-and-push-to-registry.yaml@main
     secrets: inherit
     # if you run this outside of of an org that provides KUBE_CONFIG etc as a secret, you need to specify every secret you want to pass by name
     with:
       environment: ${{ needs.generate_workflow_vars.outputs.environment }}
       registry_root: ${{ needs.setup_workflow_env.outputs.registry_root }}
       image_name: ${{ needs.setup_workflow_env.outputs.image_name }}
-      source_image: ${{ needs.setup_workflow_env.outputs.source_image }}
       default_port: ${{ needs.setup_workflow_env.outputs.default_port }}
       PUBLIC_URL: ${{ needs.generate_workflow_vars.outputs.PUBLIC_URL }}
       fetch-depth: ${{ fromJson(needs.setup_workflow_env.outputs.fetch-depth) }}