Add a symlink for index.html, update mathjax config.

plugins/mathjax.lisp

@@ -6,7 +6,7 @@
 (defvar *mathjax-header* "<script type=\"text/x-mathjax-config\">
   MathJax.Hub.Config({
     tex2jax: {
-      inlineMath: [['\\[','\\]']]
+      inlineMath: [['$$','$$']]
     }
   });
 </script>

src/indices.lisp

@@ -60,7 +60,8 @@
                          :prev (and (plusp (1- i)) (1- i))
                          :next (and (< (* i 20) (length posts)) (1+ i))
                          :relative nil)
-         until (> (* i 20) (length posts))))))
+         until (> (* i 20) (length posts)))
+      (update-symlink "index.html" "1.html"))))
 
 (defun render-by-tag ()
   "Render the indices to view posts by tag."