Custom 404 if subdomain does not match #1295
Description
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There is a wildcard DNS entry, i.e. boo.some-domain and foo.some-domain point to the same IP address. The host in the ingress routes the traffic to the correct service. When the subdomain is neither boo, nor foo, a default 404 nginx page is returned.
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An annotation that can be added to the ingress-controller and that overrides the custom 404 page by a html page that one could create themselves.
Describe alternatives you've considered
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#752, but in this case, there are two subdomains instead of two URIs, e.g. /tea. /coffee
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