provider

One more question, shall we use the [exit code](https://www.cyberciti.biz/faq/bash-get-exit-code-of-command/) of Jest to verify if all the tests success or not?

With Go's [example](https://stackoverflow.com/questions/14661511/setting-up-proxy-for-http-client): ```go proxyUrl, err := url.Parse("http://proxyIp:proxyPort") myClient := &http.Client{Transport: &http.Transport{Proxy: http.ProxyURL(proxyUrl)}} ``` It's been nearly 2 years since @sgrove post this issue firstly, but there's still no answer...

I just spent two hours to try to make the demo run, it's kind of horrible experience. According to rescript [official tutorial](https://rescript-lang.org/docs/manual/latest/installation): ```shell git clone https://github.com/rescript-lang/rescript-project-template cd rescript-project-template npm install...