The Twelve-Factor App

The Twelve-Factor App is a set of best practices for building modern software applications that are reliable, scalable, and easy to maintain. It emphasizes using environment variables for configuration, keeping code and data separate, viewing dependencies as explicit, and treating logs and backups as streams to external systems. It encourages statelessness, quick startup, and continuous deployment, ensuring the app can run consistently across different environments. Overall, these principles help developers create applications that are flexible, easier to update, and better suited for cloud-based and dynamic infrastructure.