How to host a node.js script via heroku?

Question

Node.js

Hello, I wanted to put the script I need on hosting through the Heroku website. But unfortunately, I could not adequately understand how to do it all the same. I read all the necessary information on the site itself and on the Internet, but in the end nothing helped. I want to know a fully detailed answer on how to put the script on the hosting. I would love to see your help!