implement setting bootstrap colors

config/packages/twig.yaml

@@ -2,6 +2,7 @@ twig:
     default_path: '%kernel.project_dir%/templates'
     globals:
         motd: '%env(MOTD)%'
+        motdLevel: '%env(MOTDLEVEL)%'
 
 when@test:
     twig:

templates/_navbar.html.twig

@@ -40,7 +40,12 @@
 	</div>
     {# Display MOTD, if one is set #}
     {% if motd is defined and motd is not empty %}
-    <div class="alert alert-info alert-dismissible fade show" role="alert">
+    {% if motdLevel is defined and motdLevel is not empty %}
+    
+    {% else %}
+    {% set motdLevel = "info" %}
+    {% endif %}
+    <div class="alert alert-{{ motdLevel }} alert-dismissible fade show" role="alert">
     <div class="row justify-content-end">
 			<div class="col-12 justify-content-center">
                 <p class="text-center">{{ motd }}</p>