server {
    listen 80;
    server_name yourdomain.com www.yourdomain.com;

    # 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 "no-referrer-when-downgrade" always;
    add_header Content-Security-Policy "default-src 'self' http: https: data: blob: 'unsafe-inline'" always;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_proxied any;
    gzip_comp_level 6;
    gzip_types
        text/plain
        text/css
        text/xml
        text/javascript
        application/json
        application/javascript
        application/xml+rss
        application/atom+xml
        image/svg+xml;

    # Static files
    location /static/ {
        alias /home/ubuntu/django-demo/staticfiles/;
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # Media files (if you add file uploads later)
    location /media/ {
        alias /home/ubuntu/django-demo/media/;
        expires 1y;
        add_header Cache-Control "public";
    }

    # Django application
    location / {
        proxy_pass http://127.0.0.1:8000;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_redirect off;
        
        # Timeouts
        proxy_connect_timeout 60s;
        proxy_send_timeout 60s;
        proxy_read_timeout 60s;
    }

    # Block access to sensitive files
    location ~* /\.(?!well-known\/) {
        deny all;
    }

    location ~* /(requirements\.txt|\.env|deploy/) {
        deny all;
    }
}