Still maintained? + Question

[flossgeek]

I'm not sure if this is the right place to ask, but since the buffer repository is archived I will ask my question right here.
I am having a problem running the adblockradio-buffer docker container. It launches perfectly at first and I can access the web interface at port 9820, but when I try to add a radio station I get the following error (example when adding BBC 3):
error radios: /config/insert/United Kingdom/BBC Radio 3: err=Radio is not recognized

I suspect that I need to add a configuration list with radio stations in the config folder, however it is not quite clear how exactly I should do that.
Could someone help me out? This looks like a very cool project and I can't wait to try it out.

Edit: this is the repository in question: https://github.com/adblockradio/buffer#installation