---
title: "AppConfig"
description: "The `AppConfig` entity."
section: "Reference"
group: "Types"
order: 23
---

## Definition

```ts
interface AppConfig {
  [x: string]: unknown;
  nodeVersion?: string | undefined;
  env?: Record<string, string> | undefined;
}
```

## Fields

| Field         | Type                                  | Notes                                                                |
| ------------- | ------------------------------------- | -------------------------------------------------------------------- |
| `nodeVersion` | `string \| undefined`                 | `optional` — Node.js version the app's build and runtime should use. |
| `env`         | `Record<string, string> \| undefined` | `optional` — Non-secret environment variables exposed to the app.    |