Change Slack etiquette section
Change Slack etiquette section

I think that `@here` isn't as bad as `@everyone` or `@channel` since `@here` only notifies people currently active on the Slack as per https://get.slack.help/hc/en-us/articles/202009646-Make-an-announcement
HospitalRun/hospitalrun-frontend,HospitalRun/hospitalrun-frontend,HospitalRun/hospitalrun-frontend,HospitalRun/hospitalrun-frontend