Initial code inside app.js

app.js

const express = require("express");
const cors = require("cors");
const morgan = require("morgan");

require("dotenv").config();
const port = process.env.PORT || 3000;

const app = express();

app.use(
    express.json({
      limit: "10mb",
    })
);

app.use(
    express.urlencoded({
        limit: "10mb",
        extended: false,
        parameterLimit: 10000,
        })
);

//Enable cors
app.use(cors());

app.use(morgan("common"));

app.get("/api", (req, res) => {
    const response = new Response(
        true,
        200,
        `Welcome to Sequelize Project ${port}`,
      );
    res.status(response.code).json(response);
});


//Handling unhandle routes
app.all("*", (req, res, next) => {
    const response = new Response(
        false,
        404,
        `Page not found. Can't find ${req.originalUrl} on this server`,
      );
    return res.status(response.code).json(response);
});


//listening to port
app.listen(port, () => {
    console.log(`Welcome to Sequelize Project running on port ${port}`);
});