Default environment variables Voroa sets for your service
The variables a hosting platform injects into every service, the port above all, and why your code must read them instead of hardcoding a fixed value.
What this covers
Every hosting platform injects a few environment variables into your service before it starts. The most important is the port your process must listen on. The platform decides that number, tells your service through the environment, and routes traffic to it; a service that hardcodes its own port instead will start cleanly, look healthy in your logs, and never receive a single request. This is the single most common reason a first deploy builds successfully and then fails to come up. Read the port from the environment, always.
A full reference listing every variable Voroa injects is not published in the docs today. The environment variables guide covers the port, and how to add your own values.