We have just released the source code for erlang.org website on Github. 

https://github.com/erlang/erlang-org

The website is written in Cowboy, ErlyDTL and sumo_db. It is licensed under Apache License 2.0. You can follow the instructions to set up. 

The erlang.org website is developed and maintained by Industrial Erlang User Group in collaboration with Erlang/OTP team at Ericsson.

Happy hacking!