This is a Python web app using the Django framework and the Azure Database for PostgreSQL relational database service. The Django app is hosted in a fully managed Azure App Service. This app is designed to be be run locally and then deployed to Azure. For more information on how to use this web app, see the tutorial Deploy a Python (Django or Flask) web app with PostgreSQL in Azure.
If you need an Azure account, you can create on for free.
A Flask sample application is also available for the article at https://github.com/Azure-Samples/msdocs-flask-postgresql-sample-app.