add_header help

[Indo Php]

I'm using nginx for load balancer. For debugging purposes, I'm trying to 
add_header on 50x error.
But based on manual, it's not possible.

        location = /50x.html {
                add_header Cluster      server01;
                root   /etc/nginx/html;
        }

Is there any other way to do this?


      
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