Transform a short python tool into modern javascript framework.The new tool will be installable in a local environment through a key that I would provide, and it would have a specific duration."

I am seeking help to transform a short and easy python tool (example: https://demo.newscatcherapi.com) into a modern Javascript framework. This tool needs to be installable in a local environment using a license key. The application should have a user manager with the user name, their license, and an expiration date to disable its functionality.