update

Author: minty

2-backend_api/readme.md

@@ -120,6 +120,8 @@ Azure Functions lets you connect Azure services and other resources to functions
 
 * [Azure Cosmos DB bindings for Azure Functions](https://docs.microsoft.com/azure/azure-functions/functions-bindings-cosmosdb-v2)
 
+* [Install and use the Azure Cosmos DB Emulator for local development and testing](https://docs.microsoft.com/en-us/azure/cosmos-db/local-emulator)
+
 * [Store unstructured data using Azure Functions and Azure Cosmos DB](https://docs.microsoft.com/azure/azure-functions/functions-integrate-store-unstructured-data-cosmosdb)
 
 * [Getting started with JSON features in Azure SQL Database](https://docs.microsoft.com/azure/sql-database/sql-database-json-features)