This is the personal slackbot I use at my house. I use it to help my mother track academic data for my younger siblings. It may or may not interest you.
It is not intended to be a model of exemplary coding by any stretch of the imagination. If it works, we use it. If not, I fix it. :-)
If it's helpful to know, I run this on a Debian GNU/Linux install and have not tried it on other operating systems.
To run this app, you'll need to copy the config/config.example.exs to config/config.exs and add your own values there.
Aside from this, you'll need to do the typical installation necessary for elixir apps and make sure you have phantomjs and the various ruby packages listed as required in the static/ ruby file(s).