When an Express service starts failing, the first signal is often a noisy terminal, a long log stream, or a customer report. I built Wotchi as a small, in-process alerting layer for Node.js services. It removes sensitive values, groups repeated failures, and sends bounded alerts to a destination you already use—without requiring a hosted dashboard or a new observability account. In this tutorial, we will add Wotchi to a small Express API and send a useful alert when a route fails. W...