Update installation guide with admin panel password warning

Added warning about recording admin panel password and changing it after service restart.

docs/installation/docker-compose/index.md

@@ -66,6 +66,9 @@ services:
     - API: http://localhost/api
         - Used for configuring the browser extension and mobile app to connect to your server
 
+{: .warning } 
+Ensure you have recorded down the admin panel password and change it! The password will stay on the page until the service is restarted, of which after that the password will not show anymore. If you have missed this step, follow the guide on the admin panel or the steps in [the troubleshooting guide on resetting admin panel password](./troubleshooting.md#3-forgot-aliasvault-admin-password).
+
 ---
 
 ## 2. SSL/TLS configuration
@@ -188,4 +191,4 @@ Afterwards, when you login to the AliasVault web app, you should now be able to
 {: .note }
 Important: DNS propagation can take up to 24-48 hours. During this time, email delivery might be inconsistent.
 
-If you encounter any issues, feel free to join the [Discord chat](https://discord.gg/DsaXMTEtpF) to get help from other users and maintainers.
+If you encounter any issues, feel free to join the [Discord chat](https://discord.gg/DsaXMTEtpF) to get help from other users and maintainers.