Content of this repo is outdated

[soerenthomsen]

The content of the README.md is outdated and maybe we should remove it and just link to the .github readme file instead?

[soerenthomsen]

Also the COC is not the latest version which is here after some typo corrections in the manual repo in may 2022. Not sure how to best store the COC.

[soerenthomsen]

I address the readme.md in #13 and COC in #12