Online bid item NodeJS + Websocket app

This app is developed with Node.js and MongoDB, WS(Websocket) library.
Online bidding items, with timer limits.

features:
Add item to the bids queue with a date to bid be started
Only logged in users can bid the items
Bonus time after first timer
Bid place when a new bid added and the bid timer will renewed
A new bid must be more than the previous bids
Show previous bids for users
Item replace when a new item added in to DB and the time of the new item is less than the idle item
Item replace only happens when the bid time not started
Item can be sold or not
Next item and repeat to check a new item in queue or DB
User profile
Last/Highest bid are chosen and be saved in DB with the bidder information
Users can see their items and the status of the items, like (In queue, Sold, Not sold)
If an item sold, user can see the bidder(last bid) user information and contact him/her

Source code : https://github.com/KamyarLajani/Online-Bid-Items-NodeJS