Please help me with my NestJS application. The application has:

- Microservices
- Include multi-tenancy that is fetched through subdomain.
- Connect to a  database using TypeORM
- Puppeteer to create PDF files for reports
- exceljs for creating reports in Excel
- archiver for creating zip files
- microservices for creating microservices architecture.

Please help me create more features and endpoints, a better code structure and performance assistance following NestJS best practices.