fix homepage incorrectly showing online when all backends are offline

llm_server/cluster/backend.py

@@ -108,7 +108,10 @@ def get_model_choices(regen: bool = False):
     default_backend_url = get_a_cluster_backend()
     default_backend_info = cluster_config.get_backend(default_backend_url)
     if not default_backend_info.get('model'):
-        return {}, None
+        # If everything is offline.
+        model_choices = {}
+        default_model = None
+    else:
         default_model = default_backend_info['model']
 
     redis.setp('model_choices', (model_choices, default_model))

templates/home.html

@@ -5,9 +5,6 @@
     <title>{{ llm_middleware_name }}</title>
     <meta content="width=device-width, initial-scale=1" name="viewport"/>
     {{ analytics_tracking_code|safe }}
-    <!-- https://highlightjs.org/demo#lang=json -->
-    <link href="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.8.0/styles/github.min.css" rel="stylesheet">
-    <script src="https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.8.0/highlight.min.js"></script>
     <style>
         .container {
             padding: 1em 3em;