Error: getaddrinfo ENOTFOUND localhost webpack-dev-server on MAC

Error: getaddrinfo ENOTFOUND localhost webpack-dev-server

Solved, turned out my hosts file (found under /etc/hosts on a mac) had one line missing and so webpack couldn't find localhost. I restored it to its default following these instructions and it now works!

http://stackoverflow.com/questions/35757799/webpack-dev-server-cant-find-localhost