Multi-arch docker build

.github/workflows/docker.yaml

@@ -1,4 +1,5 @@
 on:
+  pull_request: {}
   workflow_call:
     outputs:
       docker_image_tags:
@@ -11,30 +12,90 @@ jobs:
   docker-build-and-push:
     name: Push Docker image to Docker Hub
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        platform:
+          - linux/amd64
+          - linux/arm64
 
     steps:
+      - name: Prepare
+        run: |
+          platform=${{ matrix.platform }}
+          echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
       - uses: actions/checkout@v3
       - name: Log in to Docker Hub
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
       - name: Extract metadata for Docker
         id: meta
-        uses: docker/metadata-action@v4
+        uses: docker/metadata-action@v5
         with:
           images: p0security/braekhus
           tags: |
             type=raw,value=latest
             type=sha
+      - 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
         id: docker-build-and-push
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@v6
         with:
           context: .
           file: ./Dockerfile
           push: true
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          platforms: ${{ matrix.platform }}
+          outputs: type=image,name=p0security/braekhus,push-by-digest=true,name-canonical=true,push=true
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ env.PLATFORM_PAIR }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
     outputs:
       docker_image_tags: ${{ steps.meta.outputs.tags }}
+
+  merge-descriptors:
+    name: Merge descriptors
+    runs-on: ubuntu-latest
+    needs: [docker-build-and-push]
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      - name: Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: p0security/braekhus
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - 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") \
+            $(printf 'p0security/braekhus@sha256:%s ' *)
+      - name: Inspect image
+        run: |
+          docker buildx imagetools inspect p0security/braekhus:${{ steps.meta.outputs.version }}

.github/workflows/test.yaml

@@ -1,5 +1,5 @@
 on:
-  pull_request: {}
+  # pull_request: {}
   workflow_call:
 
 name: Test