To run the feature tests, you need to set up an actual Elasticsearch cluster within AWS and then call cucumber like the following:
npm run feature-tests -- --world-parameters '{"elasticUsername":"USERNAME", "elasticPassword":"PASSWORD", "cloudId": "CLOUD_ID"}'
IMPORTANT WORD OF CAUTION: I would not attempt to use this database for anything other than this feature tests, as the indexes are completely deleted without remorse.