fix listen EADDRINUSE: address already in use :::5500 code example

Example 1: Error: listen EADDRINUSE: address already in use :::8080

ps aux | grep node //gets all the nodes and list of PID
kill -9 {PID}

Example 2: Error: listen EADDRINUSE: address already in use :::8888

lsof -n -i:5000