Wasn't sure if I should post here or your Rocket.Chat instance. But just released our Desktop app to the snap store. We would love to get feedback.
Code: https://github.com/RocketChat/Rocket.Chat.Electron/tree/add-snap using electron-builder
sudo snap install rocketchat-desktop --candidate
Right now I have it behind the candidate flag, will be bumping it over to stable after a bit more testing.
I've tested so far under:
Fedora 25 - Gnome
Both seemed to work.