title: Run Cypress without checking localhost for running web server
body: <p>In addition to web based e2e tests, I am using Cypress to assert some graphql responses are correct.</p>
  <p>However if I just try to run those tests on their own, with the web server not running, then Cypress complains with the following message;</p>
  <pre><code>Cypress could not verify that this server is running:
  
  http://localhost:3000
  
  This server has been configured as your baseUrl, and tests will likely fail if it is not running.
  </code></pre>
  <p>Is it possible to run Cypress in a mode that doesn't check this server first?</p>