diff --git a/content/configuration/1.general.md b/content/configuration/1.general.md
index a13b58ca..4487bb35 100644
--- a/content/configuration/1.general.md
+++ b/content/configuration/1.general.md
@@ -52,6 +52,18 @@ When `LICENSE_KEY` or `LICENSE_TOKEN` is set in the environment, any license key
 
 All `SERVER_*` environment variables are merged with `server` instance properties created from [http.Server](https://github.com/nodejs/node/blob/master/doc/api/http.md#class-httpserver). This allows to configure server behind a proxy, a load balancer, etc. Be careful to not override methods of this instance otherwise you may incur into unexpected behaviors.
 
+### Development
+
+These variables only apply when running Directus from source in development mode (`NODE_ENV=development`), such as when contributing to the project. They have no effect on a production build or a deployed instance.
+
+| Variable       | Description                                                     | Default Value |
+| -------------- | -------------------------------------------------------------- | ------------- |
+| `DEV_APP_PORT` | Port for the Data Studio development server started by Vite.   | `8080`        |
+
+::callout{icon="i-lucide-info"}
+`DEV_APP_PORT` is separate from the API's `PORT`. When it is set, the development server fails to start if the port is already in use. When it is left unset, the server starts on `8080` and automatically increments to the next free port if `8080` is taken. Invalid values (non-integer, below `1`, or above `65535`) are ignored and fall back to `8080` with a warning.
+::
+
 ## First Admin User
 
 The following commands set details for the first admin user created when the project is bootstrapped.