Move documentation to https://docs.kanboard.org/

app/Template/doc/show.php

@@ -1,12 +0,0 @@
-<section id="main">
-    <div class="page-header">
-        <ul>
-            <li>
-                <?= $this->url->icon('life-ring', t('Table of contents'), 'DocumentationController', 'show', array('file' => 'index')) ?>
-            </li>
-        </ul>
-    </div>
-    <div class="markdown documentation">
-        <?= $content ?>
-    </div>
-</section>

app/Template/header/user_dropdown.php

@@ -29,7 +29,8 @@
         <?= $this->hook->render('template:header:dropdown') ?>
 
         <li>
-            <?= $this->url->icon('life-ring', t('Documentation'), 'DocumentationController', 'show') ?>
+            <i class="fa fa-fw fa-life-ring" aria-hidden="true"></i>
+            <?= $this->url->doc(t('Documentation'), 'index') ?>
         </li>
         <?php if (! DISABLE_LOGOUT): ?>
             <li>