Setup Error Reporting

[Restuta]

We need to see all errors happening in our app (including client-side) and react on them, for that there are couple of ideas:

• so what Atom does, when error happens, give users a button to "Report it" (without logging it into github, but with required fields to fill)
  • when setup Slack notifications about all errors that are happening
  • create UI for error message with above reporting options

• [ ] create tasks for points above

[Restuta]