Install the "express" node module via npm

[obsolete/notmuch-web] / node_modules / .bin / express

diff --git a/node_modules/.bin/express b/node_modules/.bin/express
new file mode 120000 (symlink)
index 0000000..b741d99
--- /dev/null
+++ b/node_modules/.bin/express
@@ -0,0 +1 @@
+../express/bin/express
\ No newline at end of file