I tried a simple nginx port forward
[[!format text """
location /debug-me/ {
    proxy_set_header Host $http_host;
    proxy_set_header X-Forwarded-Proto https;
    proxy_redirect off;
    proxy_pass https://127.0.0.1:8081;
    proxy_http_version 1.1;
}
"""]]

I'm not sure if I botched the proxy configuration, or if debug-me needs something added to support proxying?

[[!format text """
Connecting to debug-me server...debug-me: MalformedResponse (ResponseHead {responseCode = 301, responseMessage = "Moved Permanently", responseHeaders = [("Server","nginx/1.14.2"),("Date","Wed, 19 Aug 2020 15:02:36 GMT"),("Content-Type","text/html"),("Content-Length","185"),("Location","http://pivot.cs.unb.ca/debug-me/"),("Connection","keep-alive")]}) "Wrong response status or message."
"""]]