This modern startup stack on Azure is designed to help early-stage startups build and deploy a scalable, secure, and efficient application. The stack consists of a simple core architecture that includes Azure Entra ID for user authentication, Azure DNS + Application Gateway for routing traffic, Azure Virtual Network for isolating internal resources, Static Web App + App Service Plan for hosting the frontend and backend API, Neon Serverless PostgreSQL as a modern relational database, Azure Blob Storage for storing raw customer files, Azure Key Vault for managing secrets and credentials, GitHub Actions + Container Registry for automating build, test, deploy processes, and Azure Monitor + Log Analytics for logging, diagnostics, and alerts. The architecture is designed to scale horizontally with the addition of new customers, data, and usage, while maintaining security and control throughout.