server {
    listen 80;
    server_name _;

    # Root directory for React app
    root /usr/share/nginx/html;
    index index.html;

    # Serve static files with caching
    location ~* ^.+\.(js|css|png|jpg|jpeg|gif|ico|svg|woff|woff2|ttf|eot)$ {
        expires 1y;
        add_header Cache-Control "public, immutable";
    }

    # SPA routing - route all requests to index.html
    location / {
        try_files $uri $uri/ /index.html;
    }

    # Health check endpoint
    location /health {
        access_log off;
        return 200 "ok";
        add_header Content-Type text/plain;
    }

    # Deny access to hidden files
    location ~ /\. {
        deny all;
    }
}