This a very simple real time messenger system.
To use it on your system first install node js from the below link (if not installed)
https://nodejs.org/en/
choose the recommended version
After downloading it open a terminal in the root folder
then write
'npm init -y'
then write
'npm install express'
after installing the express write,
'npm install nodemon -D'
we are going to use it in developer mode thats why '-D'
and finally
'npm run dev'
And congratulations! you have your own real time messenging app.