Updated test command

CONTRIBUTING.md

@@ -158,7 +158,7 @@ Before running the command, make sure you have proper write permissions to the A
 To run tests manually, run phpunit from your command line:
 
 ```bash
-docker exec appwrite /bin/bash -c '/usr/share/nginx/html/vendor/bin/phpunit'
+docker exec appwrite test
 ```
 
 ## Tutorials