Work with devel env.

doc/local_ros_installation.md

@@ -12,7 +12,13 @@ See:
 - https://aiics.waraps.org/index.php/lrs-lrs_jupyter-md-single_agent_tst-md/
 for en overview of the available functionality.
 
-<div class="alert alert-dark" role="alert">
+div {
+    height: 150px;
+    width: 600px;
+    background-color: lavender;
+}
+
+<div>
   A simple dark alert—check it out!
 </div>