docs(update readme): update installation guide for karname ui

Closes WAD-7340

README.md

@@ -67,7 +67,7 @@ networks:
 
 - CD to created folder in step 1 (ex: cd D:/build)
 
-- login into repo.marcopacs.com with following command:
+- login into repo.marcopacs.com with following command, in the following command, use your username and password that can login into repo.marcopacs.com:
 
     docker login -u username -p password repo.marcopacs.com