Add GitHub Actions workflow

.github/workflows/sync.yml

@@ -0,0 +1,17 @@
+name: Sync to Hugging Face hub
+on:
+  push:
+    branches: [main]
+
+jobs:
+  sync-to-hub:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - name: Push to hub
+        env:
+          HF_TOKEN: ${{ secrets.HF_TOKEN }}
+        run: |
+          git config --global user.email "[email protected]"
+          git config --global user.name "GitHub Actions"
+          git push https://YOUR_USERNAME:[email protected]/spaces/YOUR_USERNAME/PROJECT_NAME main