environment.js

 // Common configuration files with defaults plus overrides from environment vars
var webServerDefaultPort = 8081;

module.exports = {
  // The address of a running selenium server.
  seleniumAddress:
    (process.env.SELENIUM_URL || 'http://localhost:4444/wd/hub'),

  // Capabilities to be passed to the webdriver instance.
  capabilities: {
    'browserName':
        (process.env.TEST_BROWSER_NAME || 'chrome'),
    'version':
        (process.env.TEST_BROWSER_VERSION || 'ANY')
  },

  // Default http port to host the web server
  webServerDefaultPort: webServerDefaultPort,

  // Protractor interactive tests
  interactiveTestPort: 6969,

  // A base URL for your application under test.
  baseUrl:
    'http://' + (process.env.HTTP_HOST || 'localhost') +
          ':' + (process.env.HTTP_PORT || webServerDefaultPort)

};