11. Remove db relation, communicate through events

10. Move domain logic to domain, use DDD-like approach

9. Move SQL from domain and app to adapters

8. Move Spring repositories and annotations to adapters

7. Introduce multiple Maven modules

6. Divide between commands and queries

5. Create a single entry point in each domain

4. Define feature-oriented warm-up

3. Organize code in a feature-oriented way

2. Use package-private access when possible

1. Initial application