Add multi-arch Docker build support to GitHub Actions

.github/workflows/docker-build-publish.yml

@@ -20,6 +20,12 @@ jobs:
       - name: Log in to GitHub Container Registry
         run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
 
+      - name: Set up QEMU for multi-arch builds
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Get Latest Master Version
         id: get_version
         run: |
@@ -63,19 +69,21 @@ jobs:
           git tag ${{ env.new_tag }}
           git push origin ${{ env.new_tag }}
 
-      - name: Build Docker Image
+      - name: Build and Push Docker Image
         run: |
-          docker build -t ghcr.io/${{ github.actor }}/booklore-app:${{ env.image_tag }} .
-
-      - name: Push Docker Image to GHCR
-        run: |
-          docker push ghcr.io/${{ github.actor }}/booklore-app:${{ env.image_tag }}
+          docker buildx create --use
+          docker buildx build \
+            --platform linux/amd64,linux/arm64 \
+            --tag ghcr.io/${{ github.actor }}/booklore-app:${{ env.image_tag }} \
+            --push .
 
       - name: Push Latest Tag (Only for Master)
         if: github.ref == 'refs/heads/master'
         run: |
-          docker tag ghcr.io/${{ github.actor }}/booklore-app:${{ env.new_tag }} ghcr.io/${{ github.actor }}/booklore-app:latest
-          docker push ghcr.io/${{ github.actor }}/booklore-app:latest
+          docker buildx build \
+            --platform linux/amd64,linux/arm64 \
+            --tag ghcr.io/${{ github.actor }}/booklore-app:latest \
+            --push .
 
       - name: Create GitHub Release (Only for Master)
         if: github.ref == 'refs/heads/master'