Use native runners

.github/workflows/docker.yml

@@ -10,19 +10,23 @@ on:
 
 env:
   REGISTRY: ghcr.io
-  IMAGE_NAME: ${{ github.repository }}
+  REGISTRY_IMAGE: ghcr.io/${{ github.repository }}
 
 jobs:
-  build-and-push-image:
+  build-image:
     if: ${{ github.event.workflow_run.conclusion == 'success' || github.event_name == 'workflow_dispatch' }}
-    runs-on: ubuntu-latest
+    name: Build image (${{ matrix.os }}/${{ matrix.arch }})
+    runs-on: ${{ matrix.runner }}
     strategy:
       fail-fast: false
       matrix:
         include:
-          - module: metaproxy
-            dockerfile: Dockerfile
-            image: ghcr.io/${{ github.repository }}
+          - os: linux
+            arch: amd64
+            runner: ubuntu-24.04
+          - os: linux
+            arch: arm64
+            runner: ubuntu-24.04-arm
     permissions:
       contents: read
       packages: write
@@ -44,36 +48,89 @@ jobs:
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: ${{ matrix.image }}
+          images: ${{ env.REGISTRY_IMAGE }}
           tags: |
             type=schedule
             type=ref,event=branch
             type=ref,event=tag
             type=ref,event=pr
             type=sha
 
-      - name: Cache Docker layers
-        uses: actions/cache@v4
-        with:
-          path: /tmp/.buildx-cache
-          key: ${{ runner.os }}-buildx-${{ hashFiles(matrix.dockerfile) }}
-          restore-keys: |
-            ${{ runner.os }}-buildx-
-
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
-
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      - name: Build and push Docker image
+      - name: Build and push Docker image by digest
+        id: build
         uses: docker/build-push-action@v6
         with:
           context: .
-          file:  ${{ matrix.dockerfile }}
-          platforms: linux/amd64,linux/arm64
-          push: true
-          tags: ${{ steps.meta.outputs.tags }}
+          file: Dockerfile
+          platforms: ${{ matrix.os }}/${{ matrix.arch }}
           labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=local,src=/tmp/.buildx-cache
-          cache-to: type=local,dest=/tmp/.buildx-cache,mode=max
+          outputs: type=image,name=${{ env.REGISTRY_IMAGE }},push-by-digest=true,name-canonical=true,push=true
+          cache-from: type=gha,scope=metaproxy-${{ matrix.os }}-${{ matrix.arch }}
+          cache-to: type=gha,scope=metaproxy-${{ matrix.os }}-${{ matrix.arch }},mode=max
+
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ matrix.os }}-${{ matrix.arch }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge-image:
+    if: ${{ github.event.workflow_run.conclusion == 'success' || github.event_name == 'workflow_dispatch' }}
+    name: Merge image manifests
+    runs-on: ubuntu-24.04
+    needs:
+      - build-image
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY_IMAGE }}
+          tags: |
+            type=schedule
+            type=ref,event=branch
+            type=ref,event=tag
+            type=ref,event=pr
+            type=sha
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Create manifest list and push
+        working-directory: /tmp/digests
+        run: |
+          docker buildx imagetools create \
+            $(jq -cr '.tags | map("-t " + .) | join(" ")' <<< "$DOCKER_METADATA_OUTPUT_JSON") \
+            $(printf '${{ env.REGISTRY_IMAGE }}@sha256:%s ' *)
+
+      - name: Inspect image
+        run: docker buildx imagetools inspect ${{ env.REGISTRY_IMAGE }}:${{ steps.meta.outputs.version }}