server {
    listen 80;
    server_name localhost;

    root /usr/share/nginx/html;

    # Enable CORS for all requests
    add_header Access-Control-Allow-Origin "*" always;
    add_header Access-Control-Allow-Methods "GET, POST, OPTIONS" always;
    add_header Access-Control-Allow-Headers "Origin, X-Requested-With, Content-Type, Accept" always;

    # Gzip compression
    gzip on;
    gzip_vary on;
    gzip_min_length 1024;
    gzip_types text/plain text/css text/xml text/javascript application/x-javascript application/xml+rss application/json application/javascript image/svg+xml;

    # Cache static assets
    location ~* \.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot|json|xml)$ {
        expires 30d;
        add_header Cache-Control "public, immutable";
        # Re-add CORS headers for cached files
        add_header Access-Control-Allow-Origin "*" always;
    }

    # Default location
    location / {
        autoindex on;
        try_files $uri $uri/ =404;
    }

    # Health check endpoint
    location = /health {
        access_log off;
        return 200 "healthy\n";
    }
}