Ember-CLI: include app file in Brocfile.js

I have a config setting I'd like to include in Brocfile.js, so that I don't set it in the file directly. For example, in app/config/config.js I would have something like:

export default {
  path: 'http://abc.blah.com/'
};

In my Brocfile, I'd like to do something like:

if (process.env.EMBER_ENV === 'development') {
  app.options.inlineContent = {
    assetPrefix: {
      content: config.path
    }
  };
}

How do I import/include config.js in my Brocfile, and use its path property? I tried importing, but get:

import config from 'app/config/config.js';
^^^^^^
Unexpected reserved word