This code is mostly a demo for my purposes. I wouldn't say any versions are supported (and remember I'm a PM). That said, if you find a security issue I would love to know about it.
If you find an exploitable vulnerability, then please drop me a line martinwoodward@github.com and prefix your subject "Security:"
If you see some ways I can make the security better or show best practices as part of this sample then please create an issue. Even better you can send me a PR showing me what to do.
Thanks!