Use Gunicorn in Procfile for Render, add platform detection

backend/Procfile

@@ -1,3 +1,3 @@
-# Use start_alwrity_backend.py for deployment
-# This script handles all bootstrap logic and starts uvicorn
-web: python start_alwrity_backend.py --production
+# Use Gunicorn with uvicorn worker for faster port binding on Render
+# Gunicorn binds immediately, then loads app in background
+web: gunicorn app:app --worker-class uvicorn.workers.UvicornWorker --bind 0.0.0.0:$PORT --timeout 600

backend/start_alwrity_backend.py

@@ -9,10 +9,17 @@ import os
 import sys
 import json
 import argparse
+import platform
 from pathlib import Path
 from dataclasses import dataclass, asdict
 from typing import Optional
 
+# Detect platform
+IS_WINDOWS = platform.system() == "Windows"
+IS_LINUX = platform.system() == "Linux"
+
+import uvicorn
+
 
 @dataclass
 class BootstrapResult: