ci: use ubuntu-24.04-arm runner for arm64 build instead of slow qemu vm emulation (#3475)

.github/workflows/docker.yml

@@ -8,25 +8,34 @@ on:
   pull_request:
     branches:
       - main
+  workflow_dispatch:
+
 jobs:
-  docker:
-    runs-on: ubuntu-latest
+  build:
+    strategy:
+      matrix:
+        platform:
+          - linux/amd64
+          - linux/arm64
+    runs-on: ${{ matrix.platform == 'linux/arm64' && 'ubuntu-24.04-arm' || 'ubuntu-latest' }}
     permissions:
       contents: read
       packages: write
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v4
+
       - name: Docker meta
-        id: metal
+        id: meta
         uses: docker/metadata-action@v5
         with:
-          images: |
-            ghcr.io/${{ github.repository }}
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-      - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v3
+          images: ghcr.io/${{ github.repository }}
+          flavor: |
+            suffix=-${{ matrix.platform == 'linux/arm64' && 'arm64' || 'amd64' }}
+
+      - name: Set up Docker
+        uses: docker/setup-docker-action@v4
+
       - name: Login to GitHub Container Registry
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v3
@@ -34,13 +43,64 @@ jobs:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ github.token }}
-      - name: Build and push
+
+      - name: Build and push arch-specific image
         uses: docker/build-push-action@v6
         with:
           context: .
-          platforms: linux/amd64,linux/arm64
+          platforms: ${{ matrix.platform }}
           push: ${{ github.event_name != 'pull_request' }}
-          tags: ${{ steps.metal.outputs.tags }}
-          labels: ${{ steps.metal.outputs.labels }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
+          provenance: false
+
+  create_manifest:
+    if: github.event_name != 'pull_request'
+    needs: build
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+      id-token: write
+      artifact-metadata: write
+      attestations: write
+    steps:
+      - name: Docker meta for final tags
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/${{ github.repository }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ github.token }}
+
+      - name: Create and push manifest list
+        id: push
+        env:
+          AMD64_IMAGE: ghcr.io/${{ github.repository }}:${{ steps.meta.outputs.version }}-amd64
+          ARM64_IMAGE: ghcr.io/${{ github.repository }}:${{ steps.meta.outputs.version }}-arm64
+          IMAGE: ghcr.io/${{ github.repository }}:${{ steps.meta.outputs.version }}
+          TAGS: ${{ steps.meta.outputs.tags }}
+        run: |
+          echo "$TAGS" | xargs -I {} \
+            docker buildx imagetools create -t {} $AMD64_IMAGE $ARM64_IMAGE
+
+          # Inspect digest for attestation
+          DIGEST=$(docker buildx imagetools inspect "$IMAGE" --format "{{index .Manifest.Digest}}")
+          echo "digest=$DIGEST" >> "$GITHUB_OUTPUT"
+
+      - name: Attest
+        uses: actions/attest-build-provenance@v3
+        id: attest
+        with:
+          subject-name: ghcr.io/${{ github.repository }}
+          subject-digest: ${{ steps.push.outputs.digest }}