ci(server): fix docker build actions

.github/workflows/build-server.yml

@@ -14,6 +14,9 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
       - name: Download extension artifact
         uses: dawidd6/action-download-artifact@v2
         if: ${{ inputs.local != 'true' }}