docs: improve discoverability of Code of Conduct

- move CoC from CONTRIBUTING to top-level, separate COC file
- add note/link in CONTRIBUTING
- add note/link in README (both at top, and newcomer resources)
- move CoC section in CONTRIBUTING to top of file

PR-URL: #3774
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>

CODE_OF_CONDUCT.md

@@ -0,0 +1,36 @@
+## Code of Conduct
+
+This Code of Conduct is adapted from [Rust's wonderful
+CoC](http://www.rust-lang.org/conduct.html).
+
+* We are committed to providing a friendly, safe and welcoming
+  environment for all, regardless of gender, sexual orientation,
+  disability, ethnicity, religion, or similar personal characteristic.
+* Please avoid using overtly sexual nicknames or other nicknames that
+  might detract from a friendly, safe and welcoming environment for
+  all.
+* Please be kind and courteous. There's no need to be mean or rude.
+* Respect that people have differences of opinion and that every
+  design or implementation choice carries a trade-off and numerous
+  costs. There is seldom a right answer.
+* Please keep unstructured critique to a minimum. If you have solid
+  ideas you want to experiment with, make a fork and see how it works.
+* We will exclude you from interaction if you insult, demean or harass
+  anyone. That is not welcome behavior. We interpret the term
+  "harassment" as including the definition in the [Citizen Code of
+  Conduct](http://citizencodeofconduct.org/); if you have any lack of
+  clarity about what might be included in that concept, please read
+  their definition. In particular, we don't tolerate behavior that
+  excludes people in socially marginalized groups.
+* Private harassment is also unacceptable. No matter who you are, if
+  you feel you have been or are being harassed or made uncomfortable
+  by a community member, please contact one of the channel ops or any
+  of the TSC members immediately with a capture (log, photo, email) of
+  the harassment if possible. Whether you're a regular contributor or
+  a newcomer, we care about making this community a safe place for you
+  and we've got your back.
+* Likewise any spamming, trolling, flaming, baiting or other
+  attention-stealing behavior is not welcome.
+* Avoid the use of personal pronouns in code comments or
+  documentation. There is no need to address persons when explaining
+  code (e.g. "When the developer").

CONTRIBUTING.md

@@ -1,5 +1,11 @@
 # Contributing to Node.js
 
+## Code of Conduct
+
+The Code of Conduct explains the *bare minimum* behavior
+expectations the Node Foundation requires of its contributors.
+[Please read it before participating.](./CODE_OF_CONDUCT.md)
+
 ## Issue Contributions
 
 When opening new issues or commenting on existing issues on this repository
@@ -181,41 +187,3 @@ By making a contribution to this project, I certify that:
   different license), as indicated in the file; or
 * (c) The contribution was provided directly to me by some other
   person who certified (a), (b) or (c) and I have not modified it.
-
-
-## Code of Conduct
-
-This Code of Conduct is adapted from [Rust's wonderful
-CoC](http://www.rust-lang.org/conduct.html).
-
-* We are committed to providing a friendly, safe and welcoming
-  environment for all, regardless of gender, sexual orientation,
-  disability, ethnicity, religion, or similar personal characteristic.
-* Please avoid using overtly sexual nicknames or other nicknames that
-  might detract from a friendly, safe and welcoming environment for
-  all.
-* Please be kind and courteous. There's no need to be mean or rude.
-* Respect that people have differences of opinion and that every
-  design or implementation choice carries a trade-off and numerous
-  costs. There is seldom a right answer.
-* Please keep unstructured critique to a minimum. If you have solid
-  ideas you want to experiment with, make a fork and see how it works.
-* We will exclude you from interaction if you insult, demean or harass
-  anyone.  That is not welcome behavior. We interpret the term
-  "harassment" as including the definition in the [Citizen Code of
-  Conduct](http://citizencodeofconduct.org/); if you have any lack of
-  clarity about what might be included in that concept, please read
-  their definition. In particular, we don't tolerate behavior that
-  excludes people in socially marginalized groups.
-* Private harassment is also unacceptable. No matter who you are, if
-  you feel you have been or are being harassed or made uncomfortable
-  by a community member, please contact one of the channel ops or any
-  of the TC members immediately with a capture (log, photo, email) of
-  the harassment if possible.  Whether you're a regular contributor or
-  a newcomer, we care about making this community a safe place for you
-  and we've got your back.
-* Likewise any spamming, trolling, flaming, baiting or other
-  attention-stealing behavior is not welcome.
-* Avoid the use of personal pronouns in code comments or
-  documentation. There is no need to address persons when explaining
-  code (e.g. "When the developer")

README.md

@@ -337,6 +337,7 @@ Instructions:
 
 ## Resources for Newcomers
 
+* [CODE_OF_CONDUCT.md](./CODE_OF_CONDUCT.md)
 * [CONTRIBUTING.md](./CONTRIBUTING.md)
 * [GOVERNANCE.md](./GOVERNANCE.md)
 * IRC: