Start a Flask app and the terminal prints a familiar line: "WARNING: This is a development server. Do not use it in a production deployment. " Yet plenty of desktop apps bundle that same local Flask server as their actual runtime and keep it running on the user's machine for the life of the sess...
Source: [Dev.to](https://dev.to/susumun/running-flasks-dev-server-as-a-desktop-apps-backend-what-actually-matters-2m2e)