Hi.
Just a point... if you dont have command line access to your cpanel account you can't do it. Even, using command line, you need some provileges for run right commands. Just take a look on https://documentation.cpanel.net/display/CKB/How+to+Install+a+Node.js+Application
And be advice, because "cPanel Technical Support does not provide assistance with the steps in this document." so, you're on your own.
Open to questions.