We already have underscore as a dep:
```javascript
  appConfig.port = _.find([
    process.env.npm_config_port,
    process.env.OPENSHIFT_SLS_PORT,
    process.env.OPENSHIFT_NODEJS_PORT,
    process.env.PORT,
    appConfig.port,
    process.env.npm_package_config_port,
    app.get('port'),
    3000
  ], _.isFinite);
```