install, start, selenium-standalone with geckodriver

geckodriver.js

// npm install selenium-standalone@6.5.0


var selenium = require('selenium-standalone');
var webdriverio = require('webdriverio');

const version = '3.4.0';
const drivers = { chrome:
      { version: '2.30',
        arch: 'x64',
        baseURL: 'https://chromedriver.storage.googleapis.com' },
     ie:
      { version: '3.4.0',
        arch: 'x64',
        baseURL: 'https://selenium-release.storage.googleapis.com' },
     firefox:
      { version: '0.16.1',
        arch: 'x64',
        baseURL: 'https://github.com/mozilla/geckodriver/releases/download' },
     edge: { version: '15063' } };

const startOptions = { 
  baseURL: 'https://selenium-release.storage.googleapis.com',
  version: version,
  drivers: drivers,
  seleniumArgs: [],
  spawnOptions: { stdio: 'inherit' },
  logger: console.log,
  javaPath: '/usr/bin/java'
};

selenium.install({
  version: version,
  drivers: drivers
}, (err) => {
  if(err) {
    console.log('info', `ERROR INSTALLING SELENIUM-STANDALONE: ${err}`);
  }
  console.log('installing');
  selenium.start(startOptions, (err, child) => {
    if(err) {
      console.log('info', `ERROR STARTING SELENIUM-STANDALONE: ${err}`);
    }
    console.log(child);

    // child.stderr.on('data', function(data){
    //   console.log('info', `${data}`);
    // });

    console.log('info', `SUCCESSFULLY STARTED SELENIUM-STANDALONE ${child}`);
    var options = {
      "host": "127.0.0.1",
      "port": 4444,
      "waitforTimeout": 5000,
      "connectionRetryCount": 10,
      "connectionRetryTimeout": 30000,
      "desiredCapabilities": {
        "browserName": "firefox",
      },
      logLevel: 'debug',
    };
    var client = webdriverio.remote(options);
    client.init()
    .url('http://example.com')
    .pause(1000)
    .end()
    .then(process.exit)
    .catch(function(e) {
      console.log(e);
    });
  });
})