Send keep-alive headers to Kestrel to avoid the chunked encoded bug.
Send keep-alive headers to Kestrel to avoid the chunked encoded bug.

As mentioned on https://github.com/aspnet/KestrelHttpServer/issues/341, Kestrel seems to have a bug when behind a proxy (like when we use webpack-dev-server..) and so sending the keep-alive headers to it seems to temporarily fix the glitch until it's fixed upstream. *shrug*

nuclearfurnace/blockcert,nuclearfurnace/blockcert,nuclearfurnace/blockcert