Open
Description
We need to decide which communication channels we want to use in the various parts of the community, especially when it includes people not part of the core team.
Part of that is deciding on if we want to prefer open source software over services which we couldn't run ourselves.
Consequences of the decision such as what needs to be setup need to be documented and follow up actions created.
A starting point could be to keep as much communication as possible on GitHub so that it's in one place and can be managed without moving between channels, and use Slack for chat for the beginning as it's the most advanced tool, it's used by a number of high-profile open source communities such as Kubernetes, and we already use it.