feat: add multi-architecture Docker build support

- Add linux/arm64 platform support
- Enable buildx for multi-platform builds
- Support for M1/M2 Macs

Author: miurla

.github/workflows/docker-build.yml

@@ -17,6 +17,9 @@ 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
 
@@ -32,6 +35,7 @@ jobs:
         uses: docker/build-push-action@v5
         with:
           context: .
+          platforms: linux/amd64,linux/arm64
           push: ${{ github.event_name != 'pull_request' }}
           tags: |
             ghcr.io/${{ github.repository }}:latest