Add initial version of CODE_OF_CONDUCT.md

Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

.github/CODE_OF_CONDUCT.md

@@ -0,0 +1,7 @@
+## Code of Conduct
+
+This project has adopted the [Contributor
+Covenant](https://www.contributor-covenant.org/). For details, see the full
+text [here](https://www.contributor-covenant.org/version/2/1/code_of_conduct/).
+For more information, additional questions or comments contact the project's
+maintainers.