add check_deployment.sh ub usage docs

docs/40_Usage.md

@@ -11,7 +11,7 @@ _______________________________________________________________________________
 
  IML - DEPLOYMENT CLIENT
  DOCS: https://os-docs.iml.unibe.ch/imldeployment-client/                 _____
-_________________________________________________________________________/ v0.9
+_________________________________________________________________________/ v1.5
 
 HELP:
   Loads one or more profiles profile to deploy an application.
@@ -141,3 +141,19 @@ EXAMPLES:
   Remark: The directory listing can be turned off on the package server and
   results in a 403 status.
 ```
+
+## check_deployment.sh
+
+This is a script to show the current installation status of all apps.
+This script returns exit status > 0 if the rollout or a file generation failed.
+
+The script doesn't support parameters.
+
+Example:
+
+```txt
+./check_deployment.sh 
+OK: Deployment ... Profiles: 2 ... Errors: 0
+OK: userportal - /var/log/imldeployment-client/userportal__2024-05-10__154349.log
+OK: intranet - /var/log/imldeployment-client/intranet__2024-05-10__154337.log
+```