Some of the concurrency examples in this book require a local HTTP server. These instructions show how I setup Ngnix on GNU/Linux, Mac OS X 10.9 and Windows 7.

Homebrew (copy & paste code at the bottom of http://brew.sh/):

$ ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
$ brew doctor
$ brew install nginx

Download and unpack:

Docroot is: /usr/local/var/www /usr/local/etc/nginx/nginx.conf

To have launchd start nginx at login:

ln -sfv /usr/local/opt/nginx/*.plist ~/Library/LaunchAgents

Then to load nginx now:

launchctl load ~/Library/LaunchAgents/homebrew.mxcl.nginx.plist

Or, if you don't want/need launchctl, you can just run:

nginx

/usr/share/nginx/html