feat(ci): build multi-platform images

better support for engineers across Windows, Mac (incl Apple Silicon), and Linux

Author: thekaveman

.github/workflows/publish-devcontainer.yml

@@ -28,6 +28,9 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
       - name: Set up Docker Buildx
         id: buildx
         uses: docker/setup-buildx-action@v3
@@ -43,6 +46,7 @@ jobs:
           cache-to: type=gha,scope=compilerla,mode=max
           context: .
           file: .devcontainer/Dockerfile
+          platforms: linux/amd64,linux/arm64
           push: true
           tags: |
             ${{ matrix.python-version == '3.11' && format('ghcr.io/{0}:main', github.repository) || format('ghcr.io/{0}:main_{1}', github.repository, matrix.python-version) }}