Running a custom Signal server

https://www.reddit.com/r/signal/comments/7poh3f/is_it_possible_to_create_a_private_signal_server/
https://stackoverflow.com/questions/33699970/run-custom-textsecure-signal-server
https://github.com/signalapp/Signal-Server
https://github.com/CableIM/Cable-Server/
https://ekasiswanto.wordpress.com/2017/10/03/experiences-in-using-open-whisper-systems-signal-textsecure-server/
https://ekasiswanto.wordpress.com/2017/08/07/how-to-compile-and-run-open-whisper-systems-signal-server/
https://ekasiswanto.wordpress.com/2017/08/09/how-to-compile-and-run-open-whisper-systems-signal-server-part-2/
https://ekasiswanto.wordpress.com/2017/09/29/how-to-compile-and-run-open-whisper-systems-signal-server-part-3/
http://www.slate.com/articles/technology/future_tense/2017/02/how_to_set_up_signal_private_messenger.html
https://mlsdev.com/blog/130-how-to-develop-a-secure-messenger-like-signal
https://timtaubert.de/blog/2016/01/build-your-own-signal-desktop/