Add FastAPI tutorial to Python Web Applications

Author: CarlosAlbertoFurtado

README.md

@@ -394,6 +394,7 @@ To get started, simply fork this repo. Please refer to [CONTRIBUTING.md](CONTRIB
   - [Part 4](https://danidee10.github.io/2018/01/10/realtime-django-4.html)
   - [Part 5](https://danidee10.github.io/2018/01/13/realtime-django-5.html)
   - [Part 6](https://danidee10.github.io/2018/03/12/realtime-django-6.html)
+- [Developing and Testing an Asynchronous API with FastAPI and Pytest](https://testdriven.io/blog/fastapi-crud/)
 
 ### Bots: