With a new release 0.9.0, arm build is finally available. It is not a big deal to properly install it following instructions, but problem is with exposing your instance to the internet, bc of 2 open ports requirement (1235 for ui and 8536 for a server). I have tried to use tunneling services like ngrok and pagekite to expose localhost on 1235 port, but in this case I got access to ui only without ability to execute any action.
Have you managed to successfully expose your instance? How?