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coolify-docs/content/docs/applications/phoenix.mdx
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Andras Bacsai a64450ae9d feat(platform): migrate docs from VitePress to Fumadocs + TanStack Start
Replace VitePress/Vue stack with Fumadocs MDX, TanStack Start, React 19,
and Vite. Migrate all documentation content to MDX under content/docs/.
Add full src/ app with React components, routing, search, and API page.

Remove Korrektly integration from CI/CD workflows, Dockerfile, and env
vars. Update build pipeline to output to .output/public instead of
docs/.vitepress/dist.
2026-05-06 12:08:05 +02:00

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---
title: Phoenix
description: Deploy Phoenix framework applications on Coolify with Elixir/Erlang, Nixpacks, environment variables, and database integration.
---
# Phoenix
Phoenix is a productive web framework that does not compromise speed and maintainability written in Elixir/Erlang.
## Requirements
- Set `Build Pack` to `nixpacks`
- Set `MIX_ENV` to `prod`
- It should be a `Build time` environment variable
- Set `SECRET_KEY_BASE` to a random string (https://hexdocs.pm/phoenix/deployment.html#handling-of-your-application-secrets)
- It should be a `Build time` environment variable
- Set `DATABASE_URL` to your database connection string
- It should be a `Build time` environment variable
- Set `Ports Exposes` to `4000` (default)