make it native
First check out the GitHub project page of Node-Webkit. There is a well written documentation some demos and tutorials. Every app package should contain a manifest file named package.json inside the project folder. This file contains informations how to open the app and control how the browser behaves. You can get all the information here.
Follow this “Hello World” example for a first test. It also uncovers how to customize the menu bar.
Make sure you zip only the files not the folder that contains the files. Once you’ve setup everything correctly this is the way to make your web app native.