Seq help

var Seq = require('node-seq');
var configFile = require('path').join(__dirname, 'config.json');

Seq()
  .seq(checkPath),
  .seq(parseConfig),
  .seq(connectToDb),
  .seq(startServer),
  .catch(function(err) {
    console.error(err.stack ? err.stack : err);
  });

function checkPath() {
  path.exists(configFile, function(exists) {
    if (!exists) {
      throw new Error('Config file ' + configFile + ' does not exist.  Use `cp config.json.sample '+configFile+'`.');
    } else {
      this(null);
    }
  });
}

function parseConfig() {
}

function connectToDb() {
}

function startServer() {
}