Code of conduct

[Wytamma]

let's write a code of conduct for the group. Here's the COC from useR! 2019, maybe we can do something similar. Please add and suggestion below or idea below.

[Wytamma]

@stewartmacdonald had some ideas, please reiterate them below :)

[stewartmacdonald]

I think my idea was to have a code of conduct. I don't know that I have ideas for specifics.