support devcontainer on macbook m-series

due to package discrepancies we need to install an extra python-dev package
for python3.9. Once we can build the image we would like to have the images
built by github actions as well.

.devcontainer/Dockerfile

@@ -35,6 +35,7 @@ RUN apt update && apt install -y \
     zlib1g-dev \
  && add-apt-repository ppa:deadsnakes/ppa -y \
  && apt install -y \
+    python3.9-dev \
     python3.9-full \
  # software properties pulls in pkexec, which makes the debugger unusable in vscode
  && apt purge -y \

.github/workflows/devcontainer.yml

@@ -27,6 +27,9 @@ jobs:
           tags: |
             type=ref,event=branch
             type=sha
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
       -
         name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v2
@@ -41,6 +44,7 @@ jobs:
         name: Build and push
         uses: docker/build-push-action@v5
         with:
+          platforms: linux/amd64,linux/arm64
           context: "{{defaultContext}}:.devcontainer"
           push: true
           tags: ${{ steps.meta.outputs.tags }}