Fix gunicorn app loading issue

- Add wsgi.py as dedicated WSGI entry point
- Update Dockerfile CMD to use wsgi:app instead of app:app
- Add PYTHONUNBUFFERED=1 for better logging
- Ensure production config is used in Hugging Face Spaces

Dockerfile

@@ -64,12 +64,12 @@ USER app
 EXPOSE 7860
 
 # Set environment variables
-ENV FLASK_APP=app.py
 ENV FLASK_ENV=production
+ENV PYTHONUNBUFFERED=1
 
 # Health check
 HEALTHCHECK --interval=30s --timeout=30s --start-period=60s --retries=3 \
     CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:7860/api/health')" || exit 1
 
 # Production server command for Hugging Face Spaces
-CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--workers", "2", "--timeout", "120", "--access-logfile", "-", "--error-logfile", "-", "app:app"]
+CMD ["gunicorn", "--bind", "0.0.0.0:7860", "--workers", "2", "--timeout", "120", "--access-logfile", "-", "--error-logfile", "-", "wsgi:app"]

wsgi.py

@@ -0,0 +1,16 @@
+"""
+WSGI Entry Point for PhotoGuard API
+====================================
+Production entry point for running the application with WSGI servers like Gunicorn.
+"""
+
+import os
+from app import create_app
+
+# Create Flask application instance
+# Use production config for Hugging Face Spaces deployment
+app = create_app(os.getenv('FLASK_ENV', 'production'))
+
+if __name__ == '__main__':
+    # This is for debugging only
+    app.run(host='0.0.0.0', port=7860)