The project was configured as follows:
set DATABASE_URL=sqlite:///testDb.db
set APP_SETTINGS="config.DevelopmentConfig"
Initialize manage: python manage.py db init
Migrate database: python manage.py db migrate
Update database: python manage.py db upgrade
Start server: python manage.py runserver
To start the application, the DATABASE_URL must be set, and then, run the command from root folder:
python manage.py runserver
The application will already start with the database and data on it.
Access: http://localhost:5000/getcities