Update CI

Signed-off-by: Khanh Ngo <khanh.ngo@taxfix.de>

.github/workflows/build-and-publish.yml

@@ -25,6 +25,9 @@ jobs:
             type=semver,pattern={{major}}.{{minor}}
             type=semver,pattern={{major}}
 
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+
       - name: Set up Docker Buildx
         id: buildx
         uses: docker/setup-buildx-action@v1
@@ -48,5 +51,5 @@ jobs:
         if: ${{ github.event_name == 'create' && github.event.ref_type == 'tag' }}
         with:
           context: ./docker
-          push: ${{ github.event_name != 'pull_request' }}
+          push: true
           tags: ${{ steps.meta.outputs.tags }}