Add self-hosting callout to environment variables page (#556)

Generated-By: mintlify-agent

Co-authored-by: mintlify[bot] <109931778+mintlify[bot]@users.noreply.github.com>

Author: mintlify[bot]

self-host/customize-deployment/environment-variables.mdx

@@ -3,6 +3,10 @@ title: "Environment variables"
 mode: "wide"
 ---
 
+<Note>
+🛠 This page is for engineering teams self-hosting their own Lightdash instance. If you want to configure any of these settings, please speak to the Lightdash team or your Lightdash administrators.
+</Note>
+
 This is a reference to all environment variables that can be used to configure a Lightdash deployment.
 
 | Variable                                     | Description                                                                                                                                                                                                                                                                                                                 |