code: function info (cb) {
    var data = {
      name: pjson.name,
      message: 'pong',
      version: pjson.version,
      node_env: process.env.NODE_ENV,
      node_ver: process.versions.node,
      timestamp: Date.now(),
      hostname: os.hostname(),
      uptime: process.uptime(),
      loadavg: os.loadavg()[0]
    };
  
    cb(null, data);
  }
docs: Get system informaton
  @param {Function} cb