Back-end for SaaS service

- 11 logical data model entities (Users, Reports, ReportDesigns, Scheduler, Requests, ReportsData, Contacts, ContactGroups, Results, some minor)
- email and Goole registration and auth
- send / recieve email services

- MERN architecture
- Deploy on Heroku (can discuss other free options)
- Detailed description in Swagger
- Autotests (Postman,...