Demo app does not load

[atscott]

Bug, feature request, or proposal:

The dev app does not serve correctly

What is the expected behavior?

gulp serve:devapp runs the demo app

What is the current behavior?

gulp serve:devapp successfully builds the demo app but when navigating to localhost:4200 in the browser, the app tries to retrieve the @angular/router package from the wrong place

Unhandled Promise rejection: (SystemJS) XHR error (404 Not Found) loading http://localhost:4200/@angular/router.js
Error: XHR error (404 Not Found) loading http://localhost:4200/@angular/router.js

What are the steps to reproduce?

1. gulp serve:devapp
2. navigate to localhost:4200 in the browser
3. App does not get past Loading... Console error from above

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