Update CODE_OF_CONDUCT.md and CONTRIBUTING.md

CODE_OF_CONDUCT.md

@@ -1 +1,15 @@
-Cloud-Barista Community: [Code of Conduct](https://github.com/cloud-barista/docs/blob/master/contributing/CODE_OF_CONDUCT.md)
+# 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, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socio-economic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+See [Contributor Covenant Code of Conduct](https://github.com/cloud-barista/docs/blob/master/CODE_OF_CONDUCT.md) full text

CONTRIBUTING.md

@@ -13,8 +13,8 @@ CB-Tumblebug welcomes improvements from both new and experienced contributors!
 ### (2) Contribution Guide
 
 - In general
-  - [Cloud-Barista Contribution Overview](https://github.com/cloud-barista/docs/blob/master/CONTRIBUTING.md#how-to-contribute)
-  - [Cloud-Barista Code of Conduct](https://github.com/cloud-barista/docs/blob/master/contributing/CODE_OF_CONDUCT.md)
+  - [Contributing Guide](https://github.com/cloud-barista/docs/blob/master/CONTRIBUTING.md)
+  - [Code of Conduct](https://github.com/cloud-barista/docs/blob/master/CODE_OF_CONDUCT.md)
 - In detail
   - [How to open and update a PR](https://github.com/cloud-barista/docs/blob/master/contributing/how_to_open_a_pull_request-ko.md)
     - **Be careful!**