server {
    listen 80;
    server_name localhost;

    # Serve static frontend files
    location / {
        root /usr/share/nginx/html;
        index index.html;
        try_files $uri $uri/ =404;
    }

    # Serve uploaded files
    location /uploads/ {
        alias /uploads/;
        autoindex off;
        # Cache uploaded images for 1 day
        expires 1d;
        add_header Cache-Control "public, immutable";
    }

    # Security headers
    add_header X-Frame-Options "SAMEORIGIN" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-XSS-Protection "1; mode=block" always;
}