WebHook -> git pull

gistfile1.js

// for GitHub webhook
router.all('/webhook', function(req, res) {
    var cmd = exec("git pull", {
        cwd: conf.deploy.dir
    }, function(error, stdout, stderr) {
        if (error) {
            debug(">  ERROR (error): " + error);
        }
        if (stderr && error) {
            debug(">  ERROR (error): " + error);
        }
        debug("> DONE! " + stdout);
    });
	res.send("success");
});