Use setup QEMU action instead

.gitea/workflows/build-and-copy.yaml

@@ -37,8 +37,8 @@ jobs:
           NODE_ENV: production
           OMNIVORE_API_KEY: ${{ secrets.OMNIVORE_API_KEY }}
           UMAMI_API_KEY: ${{ secrets.UMAMI_API_KEY }}
-      - name: Install Docker
-        run: curl -fsSL https://get.docker.com | sh
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
       - name: Login to gitea container registry