Add a CONTRIBUTING.md file.

This is a first draft, and needs a bunch of work and inputs from other
people more familiar with the project.

Author: stephenkilbaneadi

CONTRIBUTING.md

@@ -0,0 +1,29 @@
+# Contributing to OpenChain's Reference-Material Repository
+
+## Types of Contribution
+
+This repository contains documentation. Typical contributions are:
+* Translations of existing documents from English to other languages.
+  * This includes *re*-translation of documents when updates happen to the original document.
+* Corrections and improvements to existing documents: fixing typos, spelling, grammar, phrasing.
+* Conversion of documents from other formats to Markdown.
+* Reviewing existing Pull Requests.
+* Submitting issues identifying problems with current content, or suggesting new content.
+* Working on existing issues.
+
+Other contributions are welcomed too, such as:
+* Guides and playbooks for adoption of the OpenChain ISO/IEC standard;
+
+Contributions are also welcomed through discussions:
+* Online discussions via Slack and mailing lists.
+* Zoom calls - the OpenChain project runs regular calls, plus other calls as necessary.
+
+## Submitting Bug Reports
+
+Issues with the documentation in this repository can be logged as issues in GitHub, 
+at https://github.com/OpenChain-Project/Reference-Material/issues.
+
+TODO: Advice/Practice for use of the labels for issues: bug, documentation, duplicate, enhancement, good first issue, help wanted, invalid, question, wontfix.
+
+TODO: Expectations about response times (right now, it doesn't look good....)
+