docs: add Code of Conduct

CODE_OF_CONDUCT.md

@@ -0,0 +1,37 @@
+# Contributor Code of Conduct
+
+As contributors and maintainers of this project, and in the interest of fostering an open and
+welcoming community, we pledge to respect all people who contribute through reporting issues,
+posting feature requests, updating documentation, submitting pull requests or patches, and other
+activities.
+
+We are committed to making participation in this project a harassment-free experience for everyone,
+regardless of level of experience, gender, gender identity and expression, sexual orientation,
+disability, personal appearance, body size, race, ethnicity, age, religion, or nationality.
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery
+* Personal attacks
+* Trolling or insulting/derogatory comments
+* Public or private harassment
+* Publishing other's private information, such as physical or electronic addresses, without explicit permission
+* Other unethical or unprofessional conduct.
+
+Project maintainers have the right and responsibility to remove, edit, or reject comments, commits,
+code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct. By
+adopting this Code of Conduct, project maintainers commit themselves to fairly and consistently
+applying these principles to every aspect of managing this project. Project maintainers who do not
+follow or enforce the Code of Conduct may be permanently removed from the project team.
+
+This code of conduct applies both within project spaces and in public spaces when an individual is
+representing the project or its community.
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by opening an
+issue or contacting one or more of the project maintainers.
+
+This Code of Conduct is adapted from the [Contributor Covenant][1], version 1.2.0, available at
+[http://contributor-covenant.org/version/1/2/0/][2].
+
+[1]: http://contributor-covenant.org
+[2]: http://contributor-covenant.org/version/1/2/0/

CONTRIBUTING.md

@@ -2,6 +2,10 @@
 
 Thanks for your interest in contributing to NSQ!
 
+## Code of Conduct
+
+Help us keep NSQ open and inclusive. Please read and follow our [Code of Conduct][CODE_OF_CONDUCT.md].
+
 ## Getting Started
 
 * make sure you have a [GitHub account](https://github.com/signup/free)

README.md

@@ -67,6 +67,10 @@ NOTE: master is our *development* branch and may not be stable at all times.
 
 <a href="https://groupme.com"><img src="http://nsq.io/static/img/groupme_logo.png" width="97" align="middle"/></a>&nbsp;&nbsp;
 
+## Code of Conduct
+
+Help us keep NSQ open and inclusive. Please read and follow our [Code of Conduct][CODE_OF_CONDUCT.md].
+
 ## Authors
 
 NSQ was designed and developed by Matt Reiferson ([@imsnakes][snakes_twitter]) and Jehiah Czebotar