Added correct commands for steps on Creating a Docker container action page

content/actions/creating-actions/creating-a-docker-container-action.md

@@ -120,11 +120,20 @@ Next, the script gets the current time and sets it as an output variable that ac
   ```
   If `entrypoint.sh` executes without any errors, the action's status is set to `success`. You can also explicitly set exit codes in your action's code to provide an action's status. For more information, see "[Setting exit codes for actions](/actions/creating-actions/setting-exit-codes-for-actions)."
 
-1. Make your `entrypoint.sh` file executable by running the following command on your system.
+
+1. Make your `entrypoint.sh` file executable. Git provides a way to explicitly change the permission mode of a file so that it doesn’t get reset every time there is a clone/fork.
 
   ```shell{:copy}
-  $ chmod +x entrypoint.sh
+  $ git update-index —chmod=+x entrypoint.sh
   ```
+
+1. Optionally, to check the permission mode of the file in the git index, run the following command.
+
+  ```shell{:copy}
+  $ git ls-files --stage entrypoint.sh
+  ```
+
+   An output like `100755 e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 0       entrypoint.sh` means the file has the executable permission. In this example, `755` denotes the executable permission.
 
 ## Creating a README