Please use https://github.com/neutralinojs/neutralinojs-minimal instead of this template, if you are trying Neutralinojs v2.
Javascript starter project for Neutralinojs
Install neu-cli
$ npm i -g @neutralinojs/neu
Create Neutralino app with Javascript template
$ neu create myapp --template js
$ cd myapp
Bundle source files
$ neu build
Learn more about neu-cli from docs