Merge pull request #227 from GeoWerkstatt/attestations-fix

Fix permissions and generate attestations

.github/workflows/pre-release.yml

@@ -14,6 +14,11 @@ jobs:
   create-pre-release:
     runs-on: ubuntu-latest
     name: Build and push Docker image and create a new GitHub pre-release
+    permissions:
+      id-token: write
+      contents: read
+      attestations: write
+      packages: write
 
     steps:
       - name: Checkout repository
@@ -26,6 +31,9 @@ jobs:
           echo COMMITED_AT=$(git show -s --format=%cI `git rev-parse HEAD`) >> $GITHUB_ENV
           echo REVISION=$(git rev-parse --short HEAD) >> $GITHUB_ENV
 
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Collect Docker image metadata
         id: meta
         uses: docker/metadata-action@v5
@@ -49,6 +57,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Build and push Docker image
+        id: push
         uses: docker/build-push-action@v5
         with:
           context: .
@@ -61,6 +70,21 @@ jobs:
           sbom: true
           provenance: mode=max
 
+      - name: Generate docker image attestation
+        uses: actions/attest-build-provenance@v1
+        with:
+          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          subject-digest: ${{ steps.push.outputs.digest }}
+          push-to-registry: true
+
+      - name: Generate SBOM attestation
+        uses: actions/attest-sbom@v1
+        with:
+          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          subject-digest: ${{ steps.push.outputs.digest }}
+          sbom-path: 'sbom.json'
+          push-to-registry: true
+
       - name: Create GitHub pre-release
         run: |
           gh api \