        $ 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