I have taken the sample Flask app from Microsoft and modified it to serve an Angular app as the front end. See the quickstart link below for instructions on running flask locally and deploying to Azure. To build the Angular app, simply run 'ng build' from inside the app directory.
This is the sample Flask application for the Azure Quickstart Deploy a Python (Django or Flask) web app to Azure App Service. For instructions on how to create the Azure resources and deploy the application to Azure, refer to the Quickstart article.
Sample applications are available for the other frameworks here:
- Django https://github.com/Azure-Samples/msdocs-python-django-webapp-quickstart
- FastAPI https://github.com/Azure-Samples/msdocs-python-fastapi-webapp-quickstart
If you need an Azure account, you can create one for free.