Merge remote-tracking branch 'origin/main'

.github/workflows/docker-image.yml

@@ -6,21 +6,30 @@ on:
   pull_request:
     branches: [ "main" ]
 
+# see https://blog.thesparktree.com/docker-multi-arch-github-actions
+# https://docs.docker.com/build/ci/github-actions/push-multi-registries/
+
 jobs:
 
   build:
 
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - name: Checkout
+      uses: actions/checkout@v3
+    - name: Set up QEMU
+      uses: docker/setup-qemu-action@v2
+    - name: Set up Docker Buildx
+      uses: docker/setup-buildx-action@v2
     - name: Docker Login
       uses: docker/login-action@v2
       with:
         username: ${{ secrets.DOCKERHUB_USERNAME }}
         password: ${{ secrets.DOCKERHUB_TOKEN }}
     - name: Build and push
-      uses: docker/build-push-action@v3
+      uses: docker/build-push-action@v4
       with:
         push: true
+        platforms: linux/amd64,linux/arm64,linux/arm/v7
         tags: stefanrichterhuber/thermobeaconserver:latest