Add social sites to MkDocs (#554)

Author: bsu3338

mkdocs.yml

@@ -33,6 +33,15 @@ theme:
     - content.action.edit
     - content.code.copy
 
+extra:
+  social:
+    - icon: fontawesome/brands/discord
+      link: https://discord.gg/CEe6vDg9Ky
+    - icon: fontawesome/brands/github
+      link: https://github.com/danny-avila/LibreChat
+    - icon: fontawesome/brands/youtube
+      link: https://www.youtube.com/@LibreChat
+
 markdown_extensions:
   - attr_list
   - admonition