you can see the work By link:
config/ contains application configurations
widgets/ widgets application
controllers/ contains Web controller classes
components/ contains Web component
components/behaviors behaviors for model
migration/ contains Web controller classes
models/ contains model classes
tests/ contains various tests for the basic application
views/ contains view files for the Web application
Run migration for Database deployment
Yii > v2
PostgreSQL > 9.0
Php > 5.5
Composer