Initial commit: Windmill Git Sync service

Add containerized service for syncing Windmill workspaces to Git repositories.

Features:
- Flask webhook server for triggering syncs from Windmill
- wmill CLI integration for pulling workspace content
- Automated Git commits and push to remote repository
- Network-isolated (only accessible within Docker network)
- Designed to integrate with existing Windmill docker-compose files

Key components:
- Docker container with Python 3.11, wmill CLI, Git, and Flask
- Sync engine with error handling and logging
- External volume support for persistent workspace data
- Comprehensive documentation (README.md and CLAUDE.md)

app/server.py

@@ -0,0 +1,54 @@
+#!/usr/bin/env python3
+"""
+Flask server for receiving webhook triggers from Windmill to sync workspace to Git.
+Internal service - not exposed outside Docker network.
+"""
+import logging
+from flask import Flask, jsonify
+from sync import sync_windmill_to_git
+
+# Configure logging
+logging.basicConfig(
+    level=logging.INFO,
+    format='%(asctime)s - %(name)s - %(levelname)s - %(message)s'
+)
+logger = logging.getLogger(__name__)
+
+app = Flask(__name__)
+
+
+@app.route('/health', methods=['GET'])
+def health():
+    """Health check endpoint."""
+    return jsonify({'status': 'healthy'}), 200
+
+
+@app.route('/sync', methods=['POST'])
+def trigger_sync():
+    """
+    Trigger a sync from Windmill workspace to Git repository.
+    This endpoint is only accessible within the Docker network.
+    """
+    logger.info("Sync triggered via webhook")
+
+    try:
+        result = sync_windmill_to_git()
+
+        if result['success']:
+            logger.info(f"Sync completed successfully: {result['message']}")
+            return jsonify(result), 200
+        else:
+            logger.error(f"Sync failed: {result['message']}")
+            return jsonify(result), 500
+
+    except Exception as e:
+        logger.exception("Unexpected error during sync")
+        return jsonify({
+            'success': False,
+            'message': f'Sync failed with error: {str(e)}'
+        }), 500
+
+
+if __name__ == '__main__':
+    logger.info("Starting Windmill Git Sync server on port 8080")
+    app.run(host='0.0.0.0', port=8080, debug=False)