How to install Mattermost in HestiaCP?

[pluto]

This might be relevant.

Hacky installation of Focalboard

I was asked by a client if I could install focalboard on a hestia server. I gather this is made by the same people as mattermost, so the instructions look like they might also apply to mattermost too. First of all a disclaimer. Although this did work, it was just used as a proof of concept. Ultimately the client decided not to use it, so I didn’t spend much time considering security, and it wasn’t around long enough to see if SSL certs renewed OK. Your mileage may vary. You may destroy your ser…