feature request: Add a robots.txt file or use the noindex tag for SEO

[ReWWeR]

What problem did you meet?

Currently, the subdomain with the Logto instance is being indexed, which doesn’t serve much purpose

Describe what you'd like Logto to have

To address this issue, you can either add a robots.txt file with the following content:

User-agent: *
Disallow: /

Alternatively, you can implement the noindex tag to achieve the same effect