This reference architecture shows a serverless web application. The application serves static content from Azure Blob Storage, and implements an API using Azure Functions. The API reads data from Azure Cosmos DB and returns the results to the web app.
Two reference implementations for this architecture are available on GitHub: Drone Delivery App (ARM & Azure Pipelines) and To Do App (Bicep & GitHub Actions).
https://learn.microsoft.com/en-us/azure/architecture/web-apps/serverless/architectures/web-app
