Why aren't my assets being moved when building an electron app?

I have begun developing an app using Electron, GitHub's desktop application framework. I am using the Electron Boilerplate.

To run the app I run npm install followed by npm start. This works great with the initial boilerplate.

I now want to integrate jQuery. To do this I add:

<script>
    window.$ = window.jQuery = require('./assets/scripts/jquery-1.12.1.min.js');
</script>

Unfortunately this spits out an error in the dev console stating it can't be found. I'm assuming it's all running from the /build directory, where the assets aren't.

So my questions:

1. Should the assets from my assets folder (/assets/js and /assets/css) be copied upon npm start/npm install?
2. Is the app running from /build or is there another problem here?

Thanks