Talent schedule management system: https://www.flowboardpro.com

- Server: $5/month Ubuntu server from DigitalOcean

- HTTP Server: Caddy

- SSL: Caddy

- Backend: Ruby on Rails

- Database: PostgreSQL

- Frontend: Vanilla JS + Vue.js + Inertia.js + Boostrap

- Email: Mailgun

- Storage: S3 (very low usage)

- Backup: Daily on Dropbox using rclone

I'm not actively working on this anymore but I've users from a couple of organisations using the product which generates a good passive income