Selenium with headless chrome for testing

docker run -it --rm --init selenium

Must run with init, so we can shut it down.

Update the build system, so we can run latest stable!

https://googlechromelabs.github.io/chrome-for-testing/last-known-good-versions-with-downloads.json

I'll need to have some type of adaptive useragent system, so we're not showing

Headless Chrome in the useragent.