upstream backend_ssl_ter {
    server localhost:3080;
}

upstream backend {
    server https://express-tls:8443;
}

server {

    listen 3443 ssl;

    more_clear_headers Server; 

    proxy_pass backend_ssl_ter;


    ssl_certificate       /services-keys/ExpressTLS/cert.pem;
    ssl_certificate_key   /services-keys/ExpressTLS/key.pem;
    ssl_protocols TLSv1.3;


}

server {

    more_clear_headers Server; 

    listen 3080;
    proxy_pass backend;

}