Invalid response from forwarded server

[codeinabox]

I was trying this out by spinning up a local server using python3 -m http.server 8004, and then running docker run -it --rm --network=host -v tunwg_keys:/data ghcr.io/ntnj/tunwg tunwg --forward=http://localhost:8004.

When I try visiting the URL returned by tunwg, I get the error Invalid response from forwarded server. Looking at the Python logs there was no HTTP request, and the tunwg logs say:

2023/10/09 11:25:19 http: proxy error: dial tcp [::1]:8004: connect: connection refused