06/09/22 https://12factor.net/ Search: 12factor, 12 factor
In the modern era, software is commonly delivered as a service: called _web apps_, or _software-as-a-service_. The twelve-factor app is a methodology for building software-as-a-service apps that:
- Use **declarative** formats for setup automation, to minimize time and cost for new developers joining the project;
- Have a **clean contract** with the underlying operating system, offering **maximum portability** between execution environments;
- Are suitable for **deployment** on modern **cloud platforms**, obviating the need for servers and systems administration;
- **Minimize divergence** between development and production, enabling **continuous deployment** for maximum agility;
- And can **scale up** without significant changes to tooling, architecture, or development practices.
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