Connect Your Domain to AWS EC2
Buy a domain & open DNS settings (example: GoDaddy)
Open DNS Zone settings
Add a new A record
Example: Point subdomain to AWS EC2
Host: api
Domain: api.localhostak.online
Type: A
Value: YOUR_EC2_PUBLIC_IP
TTL: 600
Update NGINX Config for New Domain
Add your server name inside the port 80 block
sudo nano /etc/nginx/sites-available/default
Example:
sudo systemctl reload nginx
Install Certbot for SSL
Install Certbot + NGINX plugin
sudo apt update
sudo apt install certbot python3-certbot-nginx -y
Generate Free SSL Certificate
Run certbot
sudo certbot --nginx -d api.localhostak.online