formatting the commands

CONTRIBUTING.md

@@ -62,21 +62,20 @@ Ready to contribute? Here's how to set up `CI-Services` for local development.
 
 1. Fork the `CI-Services` repo on GitLab.
 2. Clone your fork locally:
-
+    ```shell
     $ git clone git@gitext.gfz-potsdam.de:your_name_here/ci-services.git
-
+    ```
 3. Create a branch for local development:
-
+    ```shell
     $ git checkout -b name-of-your-bugfix-or-feature
-
-   Now you can make your changes locally.
-
+    ```
+    Now you can make your changes locally.
 4. Commit your changes and push your branch to GitLab:
-
+    ```shell
     $ git add .
     $ git commit -m "Your detailed description of your changes."
     $ git push origin name-of-your-bugfix-or-feature
-
+    ```
 5. When you're done making changes, check that your changes pass the code style and the software tests by running the CI.
    The pylint score needs to be above 9/10.