Update README.md

Author: Maffooch

README.md

@@ -49,6 +49,11 @@ This quick start guide will do the following
 - Start the application
 - Obtain admin credentials in the initializer logs. The first initialization can take up to 3 minutes to run.
 
+
+if running DefectDojo in detached mode via `docker compose up -d`, obtain admin credentials from the initializer logs with the command below. Please note, the initializer can take up to 3 minutes to run.
+
+`docker compose logs initializer | grep "Admin password:"`
+
 ## Documentation
 
 * [Official Docs](https://docs.defectdojo.com/)