You can publish a website in a few thousand different ways here, depending on many things like your needs, preferences and technical skills.
As a general primer, please check this article:
If you have a more specific idea on what you want, we can give you more specific information on how to do it.
If you are still talking about your Node.js app, then again: our hosting doesn’t support Node.js. Our hosting is free hosting, and free hosting does not support Node.js. Premium hosting does support it, but we don’t provide the premium hosting.
So if you’re asking how to publish your Node.js app here, then the answer is: you can’t do it, because it’s not possible.