Added CONTRIBUTING.md
Related issues
Acceptance criteria
-
Implemented code changes don't diverge from the related issue. -
Documentation reflects the status quo after merge. -
Version number is incremented according to SemVer. (Snapshot versions are not merged/released.) -
Only released versions of dependencies are used (i.e. no snapshot versions). -
The changelog contains entries reflecting all changes of this MR (and their reasons).
Proposed squash commit message
Draft: Added CONTRIBUTING.md
* CONTRIBUTING.md was added
* Link from README.md was added.