Оптимальный конфиг Nginx для OpenCart 3 с ЧПУ SEO URL, FastCGI и защитой админки

# /etc/nginx/sites-available/opencart.example.com.conf

    listen 80;
    server_name opencart.example.com www.opencart.example.com;
    return 301 https://opencart.example.com$request_uri;
}

server {
    listen 443 ssl http2;
    server_name opencart.example.com;

    root /var/www/opencart.example.com/public_html;

    # Security Headers
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-XSS-Protection "1; mode=block" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;
    add_header Strict-Transport-Security "max-age=31536000; includeSubDomains; preload" always;
    add_header Permissions-Policy "geolocation=(), microphone=(), camera=()" always;

    index index.php index.html;

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

    client_max_body_size 64M;

    # Защита системных файлов OpenCart 3
    location ~* /(system|storage|vendor|config\\.php|admin/config\\.php)/? {
        deny all;
        return 403;
    }

    # Защита .twig шаблонов и ini файлов
    location ~* \\.(twig|ini|log|tpl|xml)$ {
        deny all;
        return 403;
    }

    # Обработка ЧПУ (SEO URL / SEO Pro) OpenCart 3
    location / {
        try_files $uri @opencart;
    }

    location @opencart {
        rewrite ^/(.+)$ /index.php?_route_=$1 last;
    }

    # Кэширование сгенерированных миниатюр товаров
    location ~* /image/cache/ {
        expires 365d;
        add_header Cache-Control "public, immutable";
        access_log off;
        try_files $uri @opencart;
    }

    location ~* \\.(jpg|jpeg|gif|png|webp|svg|css|js|ico|woff|woff2|ttf)$ {
        expires 365d;
        add_header Cache-Control "public, no-transform";
        access_log off;
        try_files $uri =404;
    }

    location ~ \\.php$ {
        try_files $uri =404;
        fastcgi_pass unix:/run/php/php8.1-fpm.sock;
        fastcgi_index index.php;
        include fastcgi_params;
        fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
        fastcgi_buffer_size 128k;
        fastcgi_buffers 256 16k;
        fastcgi_busy_buffers_size 256k;
        fastcgi_read_timeout 180s;
    }
}