Update server/chelon-service.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: atomicturtle

server/chelon-service.py

@@ -359,7 +359,7 @@ def sign_repodata():
     # Run the Flask app
     # Prioritize config file over environment variables
     host = config.get('CHELON_HOST') or os.environ.get('CHELON_HOST', '127.0.0.1')
-    port = int(config.get('CHELON_PORT') or os.environ.get('CHELON_PORT', 5050))
+    port = int(config.get('CHELON_PORT') or os.environ.get('CHELON_PORT') or 5050)
 
     logger.info(f"Starting Chelon service on {host}:{port}")