Closes #4

Added site tracking
Can pick the model the use
Better handle llm model based on debug or not

llm_be/templates/admin/base_site.html

@@ -0,0 +1,8 @@
+{% extends "admin/base_site.html" %}
+
+{% block extrahead %}
+{{ block.super }}
+{% if not debug %}
+<script async defer src="https://tianji.aimloperations.com/tracker.js" data-website-id="cm7x7mrcy03kfddsw2jyejzub"></script>
+{% endif %}
+{% endblock %}