Ubuntu Nginx

sudo mkdir -p /var/www/your_domain/html

<html>
    <head>
        <title>Welcome to your_domain!</title>
    </head>
    <body>
        <h1>Success!  The your_domain server block is working!</h1>
    </body>
</html>

sudo nano /etc/nginx/sites-available/your_domain

server {
        listen 80;
        listen [::]:80;

        root /var/www/your_domain/html;
        index index.html index.htm index.nginx-debian.html;

        server_name your_domain www.your_domain;

        location / {
                try_files $uri $uri/ =404;
        }
}

sudo ln -s /etc/nginx/sites-available/your_domain /etc/nginx/sites-enabled/

sudo nginx -t

sudo systemctl restart nginx

sudo certbot --nginx -d example.com -d www.example.com