When creating the custom transport to use the provided CA bundle, no proxy configuration was provided.
By default, the http.Client use the http.DefaultTransport with Proxy set to ProxyFromEnvironment.
I went with the most simple approach, it might have been better to copy the default transport and only set the custom TLS config but I have no idea how to do that in go.
Fixes #17
When creating the custom transport to use the provided CA bundle, no proxy configuration was provided. By default, the http.Client use the http.DefaultTransport with Proxy set to ProxyFromEnvironment.