make sure you have a running mysql instance update .env with DB credentials as follows:-
TYPEORM_HOST= DB_IP // eg. 127.0.0.1
TYPEORM_PORT=DB PORT // eg. 3306
TYPEORM_DATABASE=SCEHAMA_NAME // eg. air_quality
TYPEORM_USERNAME=USERNAME // eg. air_quality
TYPEORM_PASSWORD=PASSWORD // eg. air_quality_password
to run migrations
npm run migrate
npm run test
npm install
npm run build
npm start
http://localhost:3000/api-docs/swagger/