Fix SocketIO WebSocket connections for production

app/__init__.py

@@ -104,6 +104,7 @@ redis_store = RedisClient()
 document_download_client = DocumentDownloadClient()
 
 socketio = SocketIO(
+    async_mode='gevent',
     cors_allowed_origins=[
         config.Config.ADMIN_BASE_URL,
     ],

gunicorn_entry.py

@@ -2,4 +2,7 @@ from gevent import monkey
 
 monkey.patch_all()
 
-from application import application  # noqa
+from application import application as flask_app  # noqa
+from app import socketio  # noqa
+
+application = socketio