Add Code of Conduct

Author: stasm

CODE_OF_CONDUCT.md

@@ -0,0 +1,15 @@
+# Community Participation Guidelines
+
+This repository is governed by Mozilla's code of conduct and etiquette
+guidelines. For more details, please read the [Mozilla Community Participation
+Guidelines][].
+
+
+## How to Report
+
+For more information on how to report violations of the Community Participation
+Guidelines, please read our [How to Report][] page.
+
+
+[Mozilla Community Participation Guidelines]: https://www.mozilla.org/about/governance/policies/participation/
+[How to Report]: https://www.mozilla.org/about/governance/policies/participation/reporting/