nginx error page should have noindex

[pandrr]

"313 of your pages aren't indexed: Server error (5xx)"

[steam0r]

this would lead to these pages being removed, i think.

When to Use Noindex:
    noindex should be used for pages that are meant to be permanently removed, or pages that should never appear in search results (like internal search results or private user pages), not for unexpected, temporary technical issues.

Best Practices for Temporary Errors:

    Return 503 (Service Unavailable): This is the best code for maintenance or temporary outages, as it instructs bots to come back later.
    Use Retry-After Header: You can add a Retry-After HTTP header to tell search engines how long the outage is expected to last.
    Ensure Proper Server Setup: Make sure your server returns the 5xx code, rather than a 200 "OK" code accompanied by an error message (a "soft 404"), which can confuse search engines.