Theses files are examples files. You can find the same in the cowboy_examples repository[1] (Cowboy is the erlang server I use to build the application).
I should remove these files as the application do not use them.
For your information, there is no https available yet for http://fipelines.org as described in the blog post and the README. You have been warned ;)
Yes Fountain Codes are definitively something I have to look at. Improving bandwidth usage and resuming downloads are part of the next improvements with https.
For now Erlang have been an excellent fellow to deal with these things :)
https://github.com/tOkeshu/fipes/tree/master/fipes/priv/ssl