support arm via arm github-hosted runner

.github/workflows/release.yaml

@@ -12,44 +12,44 @@ on:
         description: "Version Number (semver: 1.2.3)"
         required: true
         type: string
+
 env:
-  # Use docker.io for Docker Hub if empty
   REGISTRY: ghcr.io
-  # github.repository as <account>/<repo>
   IMAGE_NAME: ${{ github.repository }}
+
 jobs:
   build:
-    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        platform: [ "linux/amd64", "linux/arm64" ]
+    # Use GitHub-hosted runner for amd64 and the arm64 partner runner for arm64
+    runs-on: ${{ matrix.platform == 'linux/arm64' && 'arm-ubuntu-24' || 'ubuntu-latest' }}
     permissions:
       contents: read
       packages: write
     steps:
       - name: Checkout
         uses: actions/checkout@v4
 
-      - name: Set up QEMU
-        uses: docker/setup-qemu-action@v3
+      # We don't need QEMU since we're running on native hardware.
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      #Login against a Docker registry except on PR
-      #https://github.com/docker/login-action
       - name: Log into registry ${{ env.REGISTRY }}
         uses: docker/login-action@v3
         with:
           registry: ${{ env.REGISTRY }}
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
+
       - name: Generate build ID
         id: prep
         run: |
           branch=${GITHUB_REF##*/}
           sha=${GITHUB_SHA::8}
           ts=$(date +%s)
-          echo "::set-output name=BUILD_ID::${branch}-${sha}-${ts}"
+          echo "BUILD_ID=${branch}-${sha}-${ts}" >> $GITHUB_OUTPUT
 
-      # Extract metadata (tags, labels) for Docker
-      # https://github.com/docker/metadata-action
       - name: Extract Docker metadata
         id: meta
         uses: docker/metadata-action@v5
@@ -59,24 +59,23 @@ jobs:
             type=raw,value=latest
             type=raw,value=${{ steps.prep.outputs.BUILD_ID }}
             type=raw,value=${{ inputs.version }}
-      # Build and push Docker image with Buildx (don't push on PR)
-      # https://github.com/docker/build-push-action
-      - name: Build and push Docker image
+
+      - name: Build and push Docker image for ${{ matrix.platform }}
         uses: docker/build-push-action@v6
         with:
           context: .
           push: true
-          platforms: linux/amd64,linux/arm64
+          platforms: ${{ matrix.platform }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+
   release:
-    needs:
-      - build
+    needs: build
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
 
-      - uses: "marvinpinto/action-automatic-releases@latest"
+      - uses: marvinpinto/action-automatic-releases@latest
         with:
           repo_token: "${{ secrets.GITHUB_TOKEN }}"
           automatic_release_tag: ${{ inputs.version }}
@@ -87,8 +86,7 @@ jobs:
     permissions:
       pull-requests: write
       contents: write
-    needs:
-      - release
+    needs: release
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
@@ -100,6 +98,7 @@ jobs:
         run: |
           git config user.name "GitHub Actions"
           git config user.email noreply@github.com
+
       - name: Update Changelog
         uses: thomaseizinger/keep-a-changelog-new-release@v3
         with:
@@ -110,11 +109,12 @@ jobs:
         run: |
           git add CHANGELOG.md
           git commit --message "Prepare release ${{ inputs.version }}"
-          echo "::set-output name=commit::$(git rev-parse HEAD)"
+          echo "commit=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT
 
       - name: Push commit
         run: |
           git push origin release/${{ inputs.version }}
+
       - name: Create pull request into main
         uses: thomaseizinger/create-pull-request@1.4.0
         with:
@@ -126,6 +126,7 @@ jobs:
           body: |
             This PR was created when the Create Release workflow was run.
             I've updated the version name and code commit: ${{ steps.make-commit.outputs.commit }}.
+
       - name: Create pull request into development
         uses: thomaseizinger/create-pull-request@1.4.0
         with: