Add a Code of Conduct

[Daniel-Mietchen]

as per
https://github.com/fnielsen/scholia/community .

Some guidance at https://mozilla.github.io/open-leadership-training-series/articles/building-communities-of-contributors/write-a-code-of-conduct/ .

[Daniel-Mietchen]

Here is some guidance on how to go about this:
https://help.github.com/en/github/building-a-strong-community/adding-a-code-of-conduct-to-your-project

[yesidays]

Hello, this is a template :)

https://gist.github.com/Integralist/4e84af31c483d0f5a182

[Daniel-Mietchen]

@yesidays that template is good contentwise but does not state anything about copyright, except indicating that it is an adaptation of some other sources without a clear copyright statement, some of which can be traced back to the Contributor Covenant, which is available under the terms of the CC BY 4.0 license.

[carlinmack]

In another project I am involved with, we also extended the Contributor Covenant (with a citation) and included additional guidance which is relevant to the project https://github.com/hfg-gmuend/openmoji/blob/master/CODE_OF_CONDUCT.md.