Enable to get socket.io file on client

I using a angulajs as frontend and node.js REST API as backend both our on different server. I want to use socket.io, but enable to get socket.io.js file on client from the node.js server i am using

<script src="http://localhost:3000/node_modules/socket.io/socket.js"></script>

to get the socket.io file.

Error: GET "localhost:3000/node_modules/socket.io/socket.js "

I highly recommend taking a look at this library: https://github.com/btford/angular-socket-io

This way you can easily integrate socket.io with Angular for client side