Configure multi-tenant( connect multiple site domain to the same backend)

I need to connect two different sites (for example, a.com and b.com) to the same Open edX backend and shared storage. Essentially, both domains should use the same LMS and CMS data.

I’ve tried configuring multiple sites using Tutor’s config yml settings (via sites, hostname, SITE_ID, HOSTNAME, APP_URL, etc.), but I haven’t found a clear example or official documentation explaining the correct setup for this multi-domain configuration.

Does anyone have correct documentation, a reference configuration, or experience successfully running multiple domains on the same Tutor/Open edX backend?