update workflow to save only last 3 images

.github/workflows/docker-publish.yml

@@ -69,4 +69,24 @@ jobs:
           file: ./docker/backend/Dockerfile.backend
           push: true
           tags: ${{ steps.meta-backend.outputs.tags }}
-          labels: ${{ steps.meta-backend.outputs.labels }}
+          labels: ${{ steps.meta-backend.outputs.labels }}
+
+  cleanup-packages:
+    runs-on: ubuntu-latest
+    needs: build-and-push-image  # This ensures cleanup runs after successful build and push
+    steps:
+      - name: Delete old frontend packages
+        uses: actions/delete-package-versions@v4
+        with:
+          package-name: ${{ env.FRONTEND_IMAGE_NAME }}
+          package-type: 'container'
+          min-versions-to-keep: 3
+          delete-only-untagged-versions: false
+
+      - name: Delete old backend packages
+        uses: actions/delete-package-versions@v4
+        with:
+          package-name: ${{ env.BACKEND_IMAGE_NAME }}
+          package-type: 'container'
+          min-versions-to-keep: 3
+          delete-only-untagged-versions: false