Add Code of Conduct

Signed-off-by: Patryk Obara <dreamer.tan@gmail.com>
Signed-off-by: krcroft <krcroft@users.noreply.github.com>

CODE_OF_CONDUCT.md

@@ -0,0 +1,58 @@
+# Code of Conduct
+
+In order to foster a welcoming, positive, and rewarding experience, we as
+community members pledge to uphold this code of conduct.
+
+*Isn't decent behavior already expected?* We want to bring our best to each
+other as peers, and explicitly documenting our expectations lets us set a high
+bar for ourselves.
+
+## Be excellent to each other
+
+"Excellent" means we:
+
+- **are wholly inclusive** to existing members and newcomers looking to
+  learn or participate. Some may raise questions that have been addressed
+  before. Kindly point them to existing discussions. Everyone was new to a
+  project once.
+- **respect** your abilities, interests, and personal differences.  Our
+  different talents documenting, testing, coding, reviewing, reporting, and/or
+  evangelizing are all valuable to the project.
+- **make concise and actionable points** to respect your time as a volunteer.
+  We respect each other's time by keeping the signal-to-noise ratio high,
+  staying on-topic, and being a good house-guest: every visit we strive to
+  leave the place in better shape than when we arrived.
+- **are kind** and **assume positive intent**, even when we disagree while
+  working towards consensus and achieving the project's technical goals.
+- **educate and illuminate** others with something we know more about. We were
+  all beginners once, and can teach and learn through feedback and sharing.
+- **are open to feedback** from others, be it technical points, interpersonal
+  tips, or language/wording suggestions.
+- **accept responsibility** by apologizing to those affected by our mistakes
+  and graciously accept apologies knowing that mistakes are part of the
+  process.
+- **use words carefully**, because we may not understand irony or negative
+  sarcasm. We communicate plainly, and we justify our positions objectively and
+  explicitly.
+- **leave with class**, without drama or bitterness, when resigning for any
+  reason. We champion your rights under the terms of the GPL to fork the code
+  and create a new project, just as we stand on the shoulders of those who gave
+  us the right to create this project.
+
+## Reporting Issues
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team (see below). All complaints will be
+reviewed and investigated and will result in a response that is deemed
+necessary and appropriate to the circumstances. The project team is obligated
+to maintain confidentiality with regard to the reporter of an incident. Further
+details of specific enforcement policies may be posted separately.
+
+The project leadership team can be contacted by email:
+- [@dreamer](mailto:patryk.obara+coc@gmail.com)
+- [@krcroft](mailto:k.r.croft+coc@gmail.com)
+
+## License and Acknowledgement
+
+This text is shared under the [CC0 - No Rights Reserved
+license](https://creativecommons.org/share-your-work/public-domain/cc0/).