nightwatch.json

{
  "src_folders" : ["client/test/e2e"],
  "output_folder" : "reports",

  "selenium" : {
    "start_process" : true,
    "server_path" : "./bin/selenium-server-standalone-3.3.1.jar",
    "log_path" : "",
    "port" : 4445,
    "cli_args" : {
      "webdriver.chrome.driver" : "./bin/chromedriver"
    }
  },

  "test_settings" : {
    "default" : {
      "launch_url" : "http://localhost",
      "selenium_port"  : 4445,
      "selenium_host"  : "localhost",
      "desiredCapabilities": {
        "browserName": "chrome",
        "javascriptEnabled": true,
        "acceptSslCerts": true
      }
    },
    "desiredCapabilities": {
    "chromeOptions": {
        "args": [
            "window-size=1280,800"
        ]
    }
}
  }
}