gistfile1.txt

location /dns-query {
  proxy_pass https://dns.google/dns-query;
}
    
    VS.
    
http {
  upstream dohproviders {
    server dns.google;
    # also tried server dns.google:443;
  }

  server {
    location /dns-query {
      proxy_pass https://dohproviders/dns-query;
    }
}