Admin: updated release workflow to build a multiplatform image that also works on m1 macs without any problems (#5553)

.github/workflows/release.yml

@@ -51,6 +51,8 @@ jobs:
         docker build -t motoserver/moto . --tag moto:${{ env.VERSION }}
     # Required to get the correct Digest
     # See https://github.com/docker/build-push-action/issues/461
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v2
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v2
     - name: Login to DockerHub
@@ -62,6 +64,7 @@ jobs:
       name: Build and push
       uses: docker/build-push-action@v2
       with:
+        platforms: linux/amd64,linux/arm64
         push: true
         tags: motoserver/moto:${{ env.VERSION }}
     - name: Increase patch version number