title: Javascript configure Server URL and store it
body: <p>I got the following setup:</p>
  
  <p>A service running under a URL or IP or whatever installed inhouse on a server and a JavaScript/HTML app installed somewhere else which provides user interfaces for the service.</p>
  
  <p>Now I do not want to hardcode the URL of the service in the UI-App. Is there any solution or best practise to make the URL configurable on installation or first startup?</p>
  
  <p>Thanks and Cheers!</p>