The Twelve Factors

1. Codebase

One codebase tracked in revision control, many deploys

2. Dependencies

Explicitly declare and isolate dependencies

3. Config

Store config in the environment

4. Backing services

Treat backing services as attached resources

5. Build, release, run

Strictly separate build and run stages

6. Processes

Execute the app as one or more stateless processes

7. Port binding

Export services via port binding

8. Concurrency

Scale out via the process model

9. Disposability

Maximize robustness with fast startup and graceful shutdown

10. Dev/prod parity

Keep development, staging, and production as similar as possible

11. Logs

Treat logs as event streams

12. Admin processes

Run admin/management tasks as one-off processes

 

courtesy of https://12factor.net/