index.html

<img id="webcam" src="https://www.webcam-4insiders.com/current/medium/14082-Webcam-Leysin-Wetter.jpg" alt="LAS Gym Construction">
<script type="text/javascript">
  var refreshImage = function() {
    var refreshInterval = 600000; // This is time in milliseconds; 60,000 = 10 minutes
    var source = "https://www.webcam-4insiders.com/current/medium/14082-Webcam-Leysin-Wetter.jpg?time=" + new Date().getTime();
    document.getElementById('webcam').src = source;
    setTimeout(refreshImage, 600000);
  }
  refreshImage();
</script>