Here's how i deployed my NodeJS App on Heroku using a free account. Just click the links to download necessary softwares:

Software used:

VSCode(or any text editor of your choice)

HerokuCLI

Git

Step 1: Create a Package.json

Introduction:

Heroku is ahosting website that allows ypu to deploy 5 apps for free with a runtime of 500+ hours per month. To deploy one, you'll need to upload 3 files:

A package.json and package-lock.json flle. You can follow my other tutorial for a step by step turtorial on making one by clicking here. The package-lock.json shows up automatically after a package.json is made. Since we will be running it on herku, on your package,json file you need to specifiy a start script and the verison of your node on enines. to now this run the command node -v. Here's an example:

{
"name": "heroku",
"version": "1.0.0",  
 "description": "", 
  "main": "index.js", 
  "scripts": {    
 "test": "echo \"Error: no test specified\" && exit 1",   
  "start": "node server.js " 
  },
"keywords": [], 
  "author": "", 
  "license": "ISC", 
  "engines": {  
   "node": "12.x" 
  }
 }

Step 2: Create Your Node.js App

Since this app will run on any port heroku give us, we need to determine the code it will gives us by using this code process.env.PORT . Here's a node js app that says "hello":

const http = require('http'); //loads the library to enable it to act as a server
var port = process.env.PORT || 5000; //specifies the port no to whatever heroku gives or 5000 on local host
http.createServer(function(req,res){ // creates a server
    res.writeHead(200,{'Content-type':'text/plain'}); //Specifies that the respones "hello" is a text
    res.end("hello"); //shows the text "hello" on th eweb page
}).listen(port); // attaches this server to the port no.

Step 3: Command Prompt

Open your command prompt by pressing Windows+R to open “Run” box then type “cmd” and then click “OK”
On you CMD, go to the root by typing "cd .." until no path is include.
Check if npm(a library manager installed by node), git and heroku is properly installed by typing:

npm --version 
git --version
heroku --version

heroku login

This create an app on heroku:

heroku create <app-name-of-your-choice>

To upload your files, you need to got to its path by typing cd <path>

 cd <your-path>

Creates a new repository(folder) on your locl device for the items in this path

git init

Connect remotely to a folder on heroku via git on your app

heroku git:remote <app-name-of-your-choice>

Copies this file remotely to your local git repository u via git on your app

git add .

Save the changes you've done on the folder with a message of "make it better"

git commit -am "make it better"

Uploads the files to the git folder on heroku. Wait for it to downlaod

git push heroku master

opens the app

heroku open app

Introduction: How to Deploy a Node.js App on Heroku

Step 1: Create a Package.json

Step 2: Create Your Node.js App

Step 3: Command Prompt