chore: streamline deprecation notices in entrypoint script and update README layout

Author: Brend-Smits

.github/workflows/update-docker-image.yml

@@ -33,12 +33,8 @@ jobs:
           image-name: docker-ci-scripts
           tags: ${{ github.ref_name }}
           push-branches: main ${{ github.ref_name }}
-          slsa-provenance: true
-          sign: true
-          sbom: true
         env:
           REGISTRY_USERNAME: ${{ github.actor }}
           REGISTRY_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           REGISTRY_URL: ghcr.io/philips-software
           GITHUB_ORGANIZATION: philips-software
-          KEYLESS: true

README.md

@@ -1,5 +1,3 @@
-<div align="center">
-
 # GitHub Action for creating and publishing docker images
 
 [![Marketplace](https://img.shields.io/badge/GitHub-Marketplace-green.svg)](https://github.com/marketplace/actions/docker-build-and-publish) [![Release](https://img.shields.io/github/release/philips-software/docker-ci-scripts.svg)](https://github.com/philips-software/docker-ci-scripts/releases)
@@ -64,6 +62,8 @@ For signing and SBOM/provenance attestations, use GitHub's built-in attestation
 
 ---
 
+<div align="center">
+
 This action will build a docker image from a given directory.
 
 </div>

entrypoint.sh

@@ -20,33 +20,8 @@ echo ""
 echo "=========================================================================================================="
 echo ""
 
-# Write deprecation notice to GitHub Step Summary
-{
-  echo "## ⚠️ DEPRECATION NOTICE"
-  echo ""
-  echo "**This action is deprecated and will no longer receive updates.**"
-  echo ""
-  echo "Please migrate to the official Docker GitHub Actions:"
-  echo ""
-  echo "### Recommended Migration"
-  echo ""
-  echo "1. **[docker/setup-buildx-action](https://github.com/docker/setup-buildx-action)** - Set up Docker Buildx"
-  echo "2. **[docker/metadata-action](https://github.com/docker/metadata-action)** - Generate image metadata and tags"
-  echo "3. **[docker/build-push-action](https://github.com/docker/build-push-action)** - Build and push images"
-  echo ""
-  echo "### Attestations & Signing"
-  echo ""
-  echo "For SBOM and provenance attestations, use the built-in support in \`docker/build-push-action\`:"
-  echo ""
-  echo "- 📖 [Docker Build Attestations Documentation](https://docs.docker.com/build/ci/github-actions/attestations/)"
-  echo ""
-  echo "### Migration Example"
-  echo ""
-  echo "See the [README](https://github.com/philips-software/docker-ci-scripts#readme) for a complete migration example."
-  echo ""
-  echo "---"
-  echo ""
-} >> "$GITHUB_STEP_SUMMARY"
+# Output deprecation warning as GitHub Actions annotation
+echo "::warning file=entrypoint.sh,line=1,title=Action Deprecated::This action is deprecated and will no longer receive updates. Please migrate to the official Docker actions: docker/setup-buildx-action, docker/metadata-action, and docker/build-push-action. See https://github.com/philips-software/docker-ci-scripts#readme for migration guide."
 
 if [ -n "${SLSA_PROVENANCE}" ]
 then