Add tutorial 'Multitenancy with FastAPI, SQLAlchemy and PostgreSQL'

README.md

@@ -183,6 +183,7 @@
 - [How to monitor your FastAPI service](https://guitton.co/posts/fastapi-monitoring) - Explains how to implement Application Performance Monitoring (APM) using OpenTelemetry and Datadog/Jaeger.
 - [Implementing FastAPI Services – Abstraction and Separation of Concerns](https://camillovisini.com/article/abstracting-fastapi-services/) - FastAPI application and service structure for a more maintainable codebase.
 - [Introducing FARM Stack - FastAPI, React, and MongoDB](https://www.mongodb.com/developer/how-to/FARM-Stack-FastAPI-React-MongoDB/) - Getting started with a complete FastAPI web application stack.
+- [Multitenancy with FastAPI, SQLAlchemy and PostgreSQL](https://mergeboard.com/blog/6-multitenancy-fastapi-sqlalchemy-postgresql/) - Learn how to make FastAPI applications multi-tenant ready.
 - [Porting Flask to FastAPI for ML Model Serving](https://www.pluralsight.com/tech-blog/porting-flask-to-fastapi-for-ml-model-serving/) - Comparison of Flask vs FastAPI.
 - [Real-time data streaming using FastAPI and WebSockets](https://stribny.name/blog/2020/07/real-time-data-streaming-using-fastapi-and-websockets/) - Learn how to stream data from FastAPI directly into a real-time chart.
 - [Running FastAPI applications in production](https://stribny.name/blog/fastapi-production/) - Use Gunicorn with systemd for production deployments.