added docker-build to github action

.github/workflows/docker-build.yml

@@ -1,27 +1,30 @@
-name: Docker Build
+name: Docker Build and Push
 
 on:
   push:
     branches:
       - main
 
 jobs:
-  build-and-push:
+  build:
     runs-on: ubuntu-latest
     steps:
       - name: Check out the repo
         uses: actions/checkout@v2
 
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
       - name: Log in to Docker Hub
         uses: docker/login-action@v1
         with:
           username: ${{ secrets.DOCKER_HUB_USERNAME }}
           password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
 
-      - name: Build and push Docker image
+      - name: Build and push multi-architecture image
         uses: docker/build-push-action@v2
         with:
           context: .
-          file: ./Dockerfile
           push: true
-          tags: jmeneghini/midsx_ubuntu:latest
+          tags: jmeneghini/midsx:latest
+          platforms: linux/amd64,linux/arm64