Recently I have been trying to create a personal website using a Flask app with Github pages. Once creating a repository titled .github.io and placing an a file titled index.html it will appear live at the address .github.io. However, once this file is deleted and replaced with a basic Flask application then a 404 page appears.
What is required to get a Flask app running on Github pages?
You can't host a python application on Github pages, it's designed for simple static file hosting. You could use something like Flask-Frozen to turn your Flask application into static pages, but then you obviously have some big tradeoffs depending on your site's functionality.