I found Slack was a better product (over Mattermost). Have you tried installing it? No, please tell me how you installed a Slack server! (j/k, but it's also ki

I found Slack was a better product (over Mattermost). Have you tried installing it? No, please tell me how you installed a Slack server! (j/k, but it's also kind of the point: GitLab wins on-prem)