এক্সপ্রেস নিয়ে nodejs এপ্লিকেশন বানানো

npm init -y

npm install express sequelize mysql2 bcrypt jsonwebtoken body-parser --save

npm install dotenv

echo. > .env

npm install --save-dev nodemon

{
  "name": "server",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start":"nodemon index.js"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "dotenv": "^16.3.1",
    "express": "^4.18.2"
  }
}

// express
const express = require("express");
//.env
require('dotenv').config()
const port = process.env.PORT
const app = express();

// bodyParser 
const bodyParser = require('body-parser');
app.use(bodyParser.json());

// route
app.get("/",(req,res)=>{
res.send("hello");
});
// application start
app.listen(port,()=>{
console.log(`server start with ${port}`);
});

nodemon index.js