Added forgotten cleanUp flag for docker process to clean up container…

… after running command

src/PzComposerModule.php

@@ -51,6 +51,7 @@ public function getProcess(
                         $imageName,
                         $processArgs,
                         interactive: true,
+                        cleanUp: true,
                         workDir: '/project',
                         exec: true
                     ))->addVolume($this->cwd, '/project');