Update docker-cd.yml

Update to build m1/arm64 targets

.github/workflows/docker-cd.yml

@@ -12,15 +12,19 @@ jobs:
     - name: Checkout Repository
       uses: actions/checkout@v2
 
+    - name: Setup Docker Buildx
+      uses: docker/setup-buildx-action@v2
+
     - name: Log in to Docker Hub
       uses: docker/login-action@v1
       with:
         username: ${{ secrets.DOCKER_USERNAME }}
         password: ${{ secrets.DOCKER_TOKEN }}
 
     - name: Build and push Server Docker image
-      uses: docker/build-push-action@v2
+      uses: docker/build-push-action@v4
       with:
         context: .
+        platforms: linux/amd64,linux/arm64,windows/amd64
         push: true
         tags: codexrems/dtr:REMSvCurrent