gunicorn issue

app.py

@@ -234,6 +234,12 @@ def create_gunicorn_app() -> Flask:
     return create_app(config_path, verify_tls, api_key, configured_url_prefix())
 
 
+# Older Gunicorn releases do not support --factory.  Expose a WSGI callable at
+# import time so they can load this application with `app:gunicorn_app`.
+if __name__ != "__main__":
+    gunicorn_app = create_gunicorn_app()
+
+
 def main() -> None:
     parser = argparse.ArgumentParser(description=__doc__)
     parser.add_argument("--config", type=Path, default=ROOT / "hue.yaml", help="Dashboard YAML file")