12 Factor App

gistfile1.txt

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