map $ssl_preread_server_name $proxy_name {
    default 127.0.0.1:10443;
    {% for line in ssl_passthrough_map %}
    {{ line }}
    {% endfor %}
}

server {

    listen 443 ;
    listen [::]:443 ;

    proxy_timeout 5m;
    proxy_responses 1;
    ssl_preread on;
    proxy_pass $proxy_name;
    
}