server {
    listen 80;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;
    charset utf-8;

    location / {
        try_files $uri $uri/ $uri.html =404;

        add_header Cache-Control "no-store, no-cache, must-revalidate, proxy-revalidate" always;
        add_header Pragma "no-cache" always;
        add_header Expires "0" always;
        add_header X-Content-Type-Options nosniff always;
    }

    error_page 404 /404.html;
}