build: use buildx

Author: cooper667

.github/workflows/build-deploy.yml

@@ -43,6 +43,9 @@ jobs:
             echo "image_tag=sha-$(echo ${{ github.sha }} | cut -c1-7)" >> $GITHUB_OUTPUT
           fi
 
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Docker meta
         id: meta
         uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051 # v5.6.1