Change how the job id is obtained.

app/templates/main/jobs/job.html.j2

@@ -2,8 +2,7 @@
 
 {% block page_content %}
 <script>
-  var url = window.location.pathname;
-  var JOB_ID = url.substring(url.lastIndexOf('/') + 1);
+  var JOB_ID = {{ job.id }}
 
   class InformationUpdater {
     constructor(jobId) {