Directly Link Install Guide

This patch makes the big installation button link directly to the
installation documentation for the latest release branch.

_includes/software.html

@@ -1,23 +1,32 @@
-<div class="content-block"> 
+<div class="content-block">
   <a href="getting-started#try-it">
     <div class="software-button" target="_blank">
       <h3 class="button-headline">Demo</h3>
       <img class="button-image" src="assets/img/try-it.jpg"/>
     </div>
   </a>
-  
-  <a href="releases">
+
+  <a id="installbtn" href="releases">
     <div class="software-button" >
       <h3 class="button-headline">Install</h3>
       <img class="button-image" src="assets/img/install-it.jpg"/>
     </div>
-  </a>  
-  
+  </a>
+
   <a href="getting-started#adopt-it" target="_blank">
     <div class="software-button" >
       <h3 class="button-headline">Adopt</h3>
       <img class="button-image" src="assets/img/use-it.jpg"/>
     </div>
-  </a>  
+  </a>
 </div>
 <div class="content-more"><a href="getting-started" style="float:right;">More…</a></div>
+
+<script type="application/javascript" src="https://docs.opencast.org/versions.js"></script>
+<script type="application/javascript">
+document.addEventListener("DOMContentLoaded", function() {
+  let latest = versions[1],
+      docs = 'https://docs.opencast.org/' + latest + '/admin/#installation/';
+  document.getElementById('installbtn').href = docs;
+});
+</script>

_layouts/default.html

@@ -8,7 +8,7 @@
             font-src data: https://fonts.gstatic.com https://use.fontawesome.com;
             frame-src https://video4.virtuos.uos.de https://calendar.google.com https://map.opencast.org;
             img-src 'self' https://apereo.org https://www.google-analytics.com;
-            script-src 'unsafe-inline' https://cdnjs.cloudflare.com/ajax/libs/cookieconsent2/3.0.3/cookieconsent.min.js https://www.google-analytics.com/analytics.js;
+            script-src 'unsafe-inline' https://cdnjs.cloudflare.com/ajax/libs/cookieconsent2/3.0.3/cookieconsent.min.js https://www.google-analytics.com/analytics.js https://docs.opencast.org/versions.js;
             style-src 'self' 'unsafe-inline' https://cdnjs.cloudflare.com/ajax/libs/cookieconsent2/3.0.3/ https://fonts.googleapis.com/ https://use.fontawesome.com/releases/v5.0.13/css/ ">
     <meta name="viewport" content="width=device-width, initial-scale=1">
     <meta name="theme-color" content="#157878">