Multi-Arch build

.github/workflows/docker-publish.yml

@@ -24,18 +24,32 @@ env:
 
 jobs:
   build:
+    strategy:
+      matrix:
+       include:
+        - arch: "linux/arm64"
+          dotnet_rid: "linux-arm64"
+          runner: "buildjet-2vcpu-ubuntu-2204-arm"
+        - arch: "linux/amd64"
+          dotnet_rid: "linux-amd64"
+          runner: "ubuntu-latest"
     concurrency:
-      group: ${{ github.workflow }}-${{ github.head_ref || github.ref_name }}
+      group: ${{ github.workflow }}-${{ github.head_ref || github.ref_name }}-${{ matrix.arch }}
       cancel-in-progress: true
-    runs-on: buildjet-2vcpu-ubuntu-2204-arm
+    runs-on: ${{ matrix.runner }}
     permissions:
       contents: read
       packages: write
       # This is used to complete the identity challenge
       # with sigstore/fulcio when running outside of PRs.
       id-token: write
-
+    
     steps:
+      - name: Building for ${{ matrix.arch }} on ${{ matrix.runner }}
+        run: echo "Building for $ARCH on $RUNNER"
+        env:
+          ARCH: ${{ matrix.arch }}
+          RUNNER: ${{ matrix.runner }}
       - name: Checkout repository
         uses: actions/checkout@v4
 
@@ -75,20 +89,16 @@ jobs:
       # https://github.com/docker/build-push-action
       - name: Build and push Docker image
         id: build-and-push
-        env:
-          BRANCH_NAME: ${{ env.BRANCH_NAME }}
         uses: docker/build-push-action@v6.10.0
         with:
           context: .
           file: ./SimpleCDN/Dockerfile
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          platforms: linux/arm64
+          platforms: ${{ matrix.arch }}
           build-args: |
-            DOTNET_BUILD_PLATFORM=linux-arm64
-            # set version number to the version in the tag name if this is a release
-            # VERSION_NUMBER=$BRANCH_NAME
+            DOTNET_BUILD_PLATFORM=${{ matrix.dotnet_rid }}
 
       # Sign the resulting Docker image digest except on PRs.
       # This will only write to the public Rekor transparency log when the Docker