# Overview We deploy our stuff on [Fly.io](https://fly.io/). (We ran on Heroku for more than a decade, but its spirit appears to have moved on, and the energy I'm chasing appears to be going by the name "Fly" these days.) Our heavy-hitting projects (Locksmith and Mechanic) each get two Fly apps per environment\*: a UI app, and an API app. \*"Environment" isn't a Fly term. Each of our projects has a production environment, a staging environment, and maybe a handful of others. We construct an environment out of specifically-provisioned Fly apps, Crunchy Bridge databases, and whatever other services are warranted. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://www.lightward.guide/technical/fly/overview.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.