nightwatch.json

{
  "src_folders" : ["tests"],
  "output_folder" : "reports",

  "test_settings" : {
    "default" : {
      "launch_url" : "http://localhost",
      "selenium_port"  : 4444,
      "selenium_host"  : "localhost",
      "silent": true
    },

    "chrome" : {
      "desiredCapabilities": {
        "browserName": "chrome"
      }
    }
  }
}