A Production-grade Nerves System

Cultivate's "Office Window System" is a view into the office for their remote employees, consisting of cameras on Pi Zeros relaying WebSocket-based streams through a cloud-based Phoenix server.

Paul demonstrates how they made the system robust, secure, and performant — developing and unit-testing Nerves code on development hardware, using umbrella applications to separate concerns, and using OTP supervision trees to build an ultra-reliable system despite intermittent library bugs.