How to "Meteorize" a Node.js bundle of a Meteor build [Heeeelp]

Hello there ,
I was able to get a bundle(node.js build) of one of old apps from galaxy. Now I wish to continue development on this Project as a Meteor project. Is there a way to convert it back to a pure Meteor app. Or I’ll have to manually recreate this Meteor app, then copy needed codes from the bundle (node.js version of my app) ? Any suggestion is highly appreciated .