[TASK] Updated test to use $_SERVER and not getenv

Author: lewisvoncken

dev/bootstrap-controller.php

@@ -16,7 +16,7 @@
     exit(1);
 }
 
-$upwardConfig = getenv('UPWARD_PHP_UPWARD_PATH');
+$upwardConfig = $_SERVER['UPWARD_PHP_UPWARD_PATH'];
 if (!$upwardConfig) {
     echo 'No path to UPWARD YAML file provided.' . PHP_EOL;
     exit(1);