This document discusses how to securely store configuration information for a Node.js application using Azure Key Vault. It involves using Key Vault to store cryptographic keys, secrets, and certificates that can be accessed by a Node.js API. The document outlines how to create a Node.js API, integrate it with Key Vault, and access secrets from the vault when running the application. It also lists the prerequisites as an Azure subscription, Azure CLI, VS Code, Node.js, and a terminal to demonstrate the implementation.