Let me show you how to setup HTTP the most easy way using NGINX. I used to setup HTTP with Apache or other related tool, but it seem like NGINX is much easier.

NGINX HTTP Server

Below are the basic configure version:

• OS: ubuntu 20.04

Step 1. Install Nginx:

sudo apt install nginx -y

Step2 Verify Nginx is Running show statusd

sudo systemctl status nginx

3.Adjust Firewall (UFW - if active):

sudo ufw allow 'Nginx HTTP'
sudo ufw reload

4. Test Nginx from your browser (Optional but Recommended):

please navigate your web browser using your local IP it should occur index page

http://172.21.201.250
or 
http://127.0.0.1

Step 5. set permission

sudo chmod 644 /var/www/html/

Step 6. Edit ngix configure to allow index to show like file management

sudo nano /etc/nginx/sites-available/default
    location / {
        try_files $uri $uri/ =404;
        autoindex on; # <--- Add this line
    }

Step 7. Test Nginx configuration for syntax errors:

when you change your configure you can verify whether it will occur error or not.

sudo nginx -t

Step 8. Reload Nginx to apply changes

sudo systemctl reload nginx

Step 9. Change your index into file management

Default will have index.nginx-debian.html in /var/www/html directory. Make sure there's no .html file in directory, it will treat any html file as index. I will rename html file ext into bk. You no need to delete it, maybe in future you want to use again.

sudo mv /var/www/html/index.nginx-debian.html /var/www/html/index.nginx-debian.html.bak

Step 10. Access to your site will show like File Management, display all your files or folder.