Configure Nginx for WordPress on Ubuntu

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

Navigate to /etc/nginx/sites-available. There, create a file with the name example.com. The name should be the same as your domain.

# Redirect HTTP -> HTTPS
server {
    listen 80;
    server_name www.example.com example.com;

    return 301 https://example.com$request_uri;
}

# Redirect WWW -> NON-WWW
server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name www.example.com;

    ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
    ssl_trusted_certificate /etc/letsencrypt/live/example.com/chain.pem;

    return 301 https://example.com$request_uri;
}

server {
    listen 443 ssl http2;
    listen [::]:443 ssl http2;
    server_name example.com;

    root /var/www/html/wordpress;
    index index.php;

    # SSL parameters
    ssl_protocols         TLSv1.2 TLSv1.3;
    ssl_ciphers           HIGH:!aNULL:!MD5;
    ssl_certificate /etc/letsencrypt/live/example.com/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/example.com/privkey.pem;
    ssl_trusted_certificate /etc/letsencrypt/live/example.com/chain.pem;
    ssl_session_timeout 1d;
    ssl_session_cache shared:MozSSL:10m;
    ssl_session_tickets off;
    ssl_prefer_server_ciphers off;
    ssl_stapling on;
    ssl_stapling_verify on;
    resolver 1.1.1.1 1.0.0.1 valid=300s;
    resolver_timeout 30s;

    # log files
    access_log /var/log/nginx/example.com.access.log;
    error_log /var/log/nginx/example.com.error.log;

    location = /favicon.ico {
    log_not_found off;
    access_log off;
    }

    location = /robots.txt {
    allow all;
    log_not_found off;
    access_log off;
    }

    location / {
    try_files $uri $uri/ /index.php?$args;
    }

    location ~ \.php$ {
    include snippets/fastcgi-php.conf;
    fastcgi_pass unix:/run/php/php8.1-fpm.sock;
    }

    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg)$ {
    expires max;
    log_not_found off;
    }
}

then create a symbolic link to the sites-enabled directory.

sudo ln -s /etc/nginx/sites-available/sample.com /etc/nginx/sites-enabled/sample.com

sudo nginx -t
nginx -s reload

References
https://www.hostinger.com/tutorials/how-to-install-wordpress-with-nginx-on-ubuntu/
https://www.nginx.com/resources/wiki/start/topics/recipes/wordpress/
https://wordpress.org/documentation/article/nginx/