$ express -h
Usage: express [options]
Options:
-h, --help output usage information
-V, --version output the version number
-s, --sessions add session support
-e, --ejs add ejs engine support (defaults to jade)
-J, --jshtml add jshtml engine support (defaults to jade)
-H, --hogan add hogan.js engine support
-c, --css add stylesheet support (less|stylus) (defaults to plain css)
-f, --force force on non-empty directory