feat: add Docker Buildx setup step to deployment workflow

Author: davengn

.github/workflows/deploy.yml

@@ -34,6 +34,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
       - name: Log in to GHCR
         uses: docker/login-action@v3
         with: