title: Use npm protractor webdriver-manager to start selenium server at a different port
body: <p>I am trying to run E2E tests for an angular application using protractor.  I use the command <code>./node_modules/protractor/bin/webdriver-manager</code> to start my selenium server.  However the default selenium server location is localhost:4444/wd/hub, but localhost:4444 is already used on my machine and this is difficult to change.  How do I start a selenium server at a port other than 4444?</p>