Technical requirements

The following additional folders are required in this chapter and should be created:

tozo
└── backend
    ├── src
    │   └── backend
    │       ├── blueprints
    │       ├── lib
    │       └── templates
    └── tests
        ├── blueprints
        └── lib

Empty backend/src/backend/__init__.py, backend/src/backend/blueprints/__init__.py, backend/src/backend/lib/__init__.py, backend/tests/__init__.py, backend/tests/blueprints...