Mention new format & lint checks setup

CONTRIBUTING.md

@@ -8,14 +8,21 @@ updated.
 
 # Maintaining
 
+## Code Format & Linting
+
+Code format and lint checks are performed locally when committing to ensure the changes align with the configured rules of this repository. This happens with the help of the tools [simple-git-hooks](https://github.com/toplenboren/simple-git-hooks) and [lint-staged](https://github.com/okonet/lint-staged) which are automatically installed and configured on `npm install` (no further steps required).
+
+In case of problems, a corresponding message is displayed in your terminal.
+Please fix them and then run the commit command again.
+
 ## Test
 
-Tests can be run with command:
+Tests can be run with the command:
 
 ```bash
 npm test
 ```
 
 ## Release
 
-Use [np](https://www.npmjs.com/package/np) to create a new release
+Use [np](https://www.npmjs.com/package/np) to create a new release.