1. 1. Introduction
2. 1. 1.1. Project Structure
4. Common Package
5. 2. Package Structure
6. 1. 2.1. lib.rs
   2. 2.2. Error Handling
7. 3. Models
8. 1. 3.1. Define a structure
   2. 3.2. Define API Client
   3. 3.3. Repository
   4. 3.4. Query Builder
   5. 3.5. Relations
   6. 1. 3.5.1. One to Many
      2. 3.5.2. Many to Many
   7. 3.6. Nesting Relation Fields
   8. 3.7. Aggregator
   9. 3.8. Validation
   10. 3.9. Translation
9. 4. DTOs
11. Frontend
12. 5. Web
13. 1. 5.1. Package Structure
    2. 5.2. Testing
14. 6. Mobile App
16. Backend
17. 7. Backend
18. 1. 7.1. Package Structure
    2. 7.2. Authentication
    3. 7.3. Testing
20. ICP
21. 8. Canister
22. 1. 8.1. Package Structure
    2. 8.2. Testing
24. CI/CD
25. 9. Web
26. 10. Backend
27. 11. Integration Testing