Question installing npm on a linux server that runs plesk onyx

[dirtyL-123]

I need for my Magento 2 Installation the grunt javascript task runner to optimize my frontend developing workflow. since i allready tried to install node.js on a plesk 12.5 server over apt-get i recognized that it will remove some pelsk packages and crashed the server. now i need to install npm so that i can install grunt with it. when i do apt-get install npm on it, it again trys to remove some plesk packages. im wondering if there is maybe a way to install grunt for magento 2 over the webinterface since it got node.js support.

what would be the best way to install grunt for the magento 2 installation on the linux system runing plesk onyx ? :/