Build multi-arch

.github/workflows/docker-publish.yml

@@ -1,13 +1,9 @@
-# This workflow builds and pushes a Docker image to GitHub Container Registry (ghcr.io) on every push to main.
+# This workflow builds and pushes a multi-architecture Docker image to GitHub Container Registry (ghcr.io).
 #
 # The Docker meta step is required because GitHub repository names can contain uppercase letters, but Docker image tags must be lowercase.
 # The docker/metadata-action@v5 normalizes the repository name to lowercase, ensuring the build and push steps use a valid image tag.
 #
-# Without this normalization, you may encounter errors like:
-#   ERROR: failed to build: invalid tag "ghcr.io/jgsuess/FHIRFLARE-IG-Toolkit:latest": repository name must be lowercase
-#   Error: Process completed with exit code 1.
-#
-# This workflow uses the IMAGE_NAME environment variable set by the Docker meta step to guarantee a valid, lowercase image name.
+# This workflow builds for both AMD64 and ARM64 architectures using Docker Buildx and QEMU emulation.
 
 name: Build and Push Docker image
 
@@ -25,6 +21,12 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+        
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Log in to GitHub Container Registry
         uses: docker/login-action@v3
         with:
@@ -46,10 +48,11 @@ jobs:
             echo "IMAGE_NAME=${{ steps.meta.outputs.tags }}" >> $GITHUB_ENV
           fi
 
-      - name: Build Docker image
-        run: |
-          docker build -f docker/Dockerfile -t ${{ env.IMAGE_NAME }} .
-
-      - name: Push Docker image
-        run: |
-          docker push ${{ env.IMAGE_NAME }}
+      - name: Build and push multi-architecture Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          file: ./docker/Dockerfile
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ env.IMAGE_NAME }}