In addition to configuring your app itself, you can also configure Ember CLI.
These configurations can be made by adding them to the .ember-cli file in your application's root. Many can also be made by passing them as arguments to the command line program.
For example, a common desire is to change the port that Ember CLI serves the app from. It's possible to pass the port number from the command line with ember server --port 8080, if you want to pass the port to your npm start script you would pass it with an extra -- like this: npm start -- --port 8080. To make this configuration permanent, edit your .ember-cli file like so:
{
"port": 8080
}For a full list of command line options, run ember help.
More information on configuring the Ember CLI can be found in the CLI Guides.