docs: add community health files (CODE_OF_CONDUCT.md)

CODE_OF_CONDUCT.md

@@ -0,0 +1,30 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our community a harassment-free experience for everyone.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment:
+- Using welcoming and inclusive language
+- Being respectful of differing viewpoints
+- Gracefully accepting constructive criticism
+- Focusing on what is best for the community
+
+Examples of unacceptable behavior:
+- Harassment of any kind
+- Trolling, insulting or derogatory comments
+- Public or private harassment
+- Publishing others' private information without permission
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported to the project maintainers.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant](https://www.contributor-covenant.org), version 2.1.
+
+---
+*[Mukller](https://github.com/Mukller)*

README.md

@@ -494,3 +494,7 @@ a non-profit organization committed to providing long-term support and developme
 Tianshou was previously a reinforcement learning platform based on TensorFlow. You can check out the branch [`priv`](https://github.com/thu-ml/tianshou/tree/priv) for more detail. Many thanks to [Haosheng Zou](https://github.com/HaoshengZou)'s pioneering work for Tianshou before version 0.1.1.
 
 We would like to thank [TSAIL](http://ml.cs.tsinghua.edu.cn/) and [Institute for Artificial Intelligence, Tsinghua University](http://ml.cs.tsinghua.edu.cn/thuai/) for providing such an excellent AI research platform.
+
+---
+
+*[Mukller](https://github.com/Mukller)*