will setup a default environment config file at <code>config/environment</code>. Here, you can define an <code>ENV</code> object for each environment, which are currently limited to three: development, test, and production.</p>
<p>The ENV object contains three important keys:</p>
<ul>
<li><code>EmberENV</code> can be used to define Ember feature flags (see the <a href="./feature-flags/">Feature Flags guide</a>).</li>
<li><code>APP</code> can be used to pass flags/options to your application instance.</li>
<