build: push to github packages instead of docker

.github/workflows/publish-image.yml

@@ -6,24 +6,32 @@ on:
       - v**
   workflow_dispatch:  # Allows to trigger the workflow manually in GitHub UI
 
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
 jobs:
   build-and-push-image:
     runs-on: ubuntu-latest
     permissions:
       contents: read
+      packages: write
+      attestations: write
+      id-token: write
     steps:
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+      - name: Checkout repository
+        uses: actions/checkout@v4
       - name: Log in to the Container registry
         uses: docker/login-action@v3.3.0
         with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
       - name: Extract metadata (tags, labels) for Docker
         id: meta
         uses: docker/metadata-action@v5.5.1
         with:
-          images: tablegpt/ipy-kernel
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           # semver has default priority 900, sha has default priority 100
           # ref has default priority 600
           # see <https://github.com/docker/metadata-action#priority-attribute>
@@ -33,18 +41,15 @@ jobs:
             type=semver,pattern={{version}}
             type=sha,priority=850,prefix=
       - name: Build and push Docker image
+        id: push
         uses: docker/build-push-action@v6.9.0
         with:
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-      # dockerhub-description requires checkout
-      - uses: actions/checkout@v4
-      - name: TableGPT Kernel Docker Hub Description
-        uses: peter-evans/dockerhub-description@v4
+      - name: Generate artifact attestation
+        uses: actions/attest-build-provenance@v1
         with:
-          username: ${{ secrets.DOCKER_USERNAME }}
-          password: ${{ secrets.DOCKER_PASSWORD }}
-          repository: tablegpt/ipy-kernel
-          short-description: TableGPT Ipython Kernel
-          readme-filepath: ./README.md
+          subject-name: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME}}
+          subject-digest: ${{ steps.push.outputs.digest }}
+          push-to-registry: true