Let's first build the backend of the app. First of all, run npm install inside the initial directory to install the required dependencies for our backend.

Here is the complete backend code to run an express service and serve the index.html file and static files:

var express = require("express");   
var app = express();   

app.use(express.static("public")); 

app.get("/", function(req, res){ 
 res.sendFile(__dirname + "/public/html/index.html"); 
}) 

app.listen(8080);

The preceding code is self-explanatory.