Codex Cloud has severe issues with hex.pm (Elixir package manager)

I think I finally figured out what’s causing codex to not work with hex.pm

The issue is with httpc that it uses to connect to hex. 2 issues here:

1. Missing certificates, fix with HEX_CACERTS_PATH=/usr/local/share/ca-certificates/envoy-mitmproxy-ca-cert.crt
2. httpc sends empty headers (like Te: ) which envoy chokes on. Either add a mitm proxy that strips all empty headers before forwarding to the local proxy, OR patch httpc erlang code to not send empty headers. That seems to fix it