Add default htdocs index.

diff --git a/htdocs/index.html b/htdocs/index.html
new file mode 120000 (symlink)
index 0000000..c9bc4e3
--- /dev/null
+++ b/htdocs/index.html
@@ -0,0 +1 @@
+pithos.html
\ No newline at end of file