title: Two way communication in nestjs
body: <p>I am stuck in a problem and I know you'll have a solution to it. I have a client and merchant interface. There can be n client and n merchants. Client can send a request to merchant. Merchant can accept it or reject. If the merchant doesn't accept it, it will be automatically rejected in 5 mins. How will I notify my client that you request has been accepted or rejected,while he's on the interface. Should I use socket or something else ? How do I implement this functionality ?</p>