add back auth_url warning

Author: msukkari

docs/docs/configuration/auth/overview.mdx

@@ -2,6 +2,8 @@
 title: Overview
 ---
 
+<Warning>If you're deploying Sourcebot behind a domain, you must set the [AUTH_URL](/docs/configuration/environment-variables) environment variable.</Warning>
+
 Sourcebot has built-in authentication that gates access to your organization. OAuth, email codes, and email / password are supported. 
 
 The first account that's registered on a Sourcebot deployment is made the owner. All other users who register must be [approved](/docs/configuration/auth/overview#approving-new-members) by the owner.
@@ -40,8 +42,6 @@ See [transactional emails](/docs/configuration/transactional-emails) for more de
 
 ## Enterprise Authentication Providers
 
-<Warning>If you're deploying Sourcebot behind a domain, you must set the [AUTH_URL](/docs/configuration/environment-variables) environment variable to use these providers.</Warning>
-
 The following authentication providers require an [enterprise license](/docs/license-key) to be enabled.
 
 By default, a new user registering using these providers must have their join request accepted by the owner of the organization to join. To allow a user to join automatically when

docs/docs/deployment-guide.mdx

@@ -53,6 +53,9 @@ Watch this 1:51 minute video to get a quick overview of how to deploy Sourcebot
     </Step>
 
     <Step title="Launch your instance">
+        <Warning>If you're deploying Sourcebot behind a domain, you must set the [AUTH_URL](/docs/configuration/environment-variables) environment variable.</Warning>
+
+
         In the same directory as `config.json`, run the following command to start your instance:
 
         ``` bash