new contributing.md

Author: jaimejim

CONTRIBUTING.md

@@ -1,5 +1,20 @@
+# Contributing
 
+This repository relates to activities in the Internet Engineering Task Force
+([IETF](https://www.ietf.org/)). All material in this repository is considered
+Contributions to the IETF Standards Process, as defined in the intellectual
+property policies of IETF currently designated as
+[BCP 78](https://www.rfc-editor.org/info/bcp78),
+[BCP 79](https://www.rfc-editor.org/info/bcp79) and the
+[IETF Trust Legal Provisions (TLP) Relating to IETF Documents](http://trustee.ietf.org/trust-legal-provisions.html).
 
+Any edit, commit, pull request, issue, comment or other change made to this
+repository constitutes Contributions to the IETF Standards Process
+(https://www.ietf.org/).
+
+You agree to comply with all applicable IETF policies and procedures, including,
+BCP 78, 79, the TLP, and the TLP rules regarding code components (e.g. being
+subject to a Simplified BSD License) in Contributions.
 ## Working Group Information
 
 Discussion of this work occurs on the [Constrained RESTful Environments
@@ -14,3 +29,17 @@ technical issues needs to occur on the mailing list.
 
 You might also like to familiarize yourself with other
 [Working Group documents](https://datatracker.ietf.org/wg/core/documents/).
+## Working Group Information
+
+Discussion of this work occurs on the [Constrained RESTful Environments
+Working Group mailing list](mailto:core@ietf.org)
+([archive](https://mailarchive.ietf.org/arch/browse/core/),
+[subscribe](https://www.ietf.org/mailman/listinfo/core)).
+In addition to contributions in GitHub, you are encouraged to participate in
+discussions there.
+
+**Note**: Some working groups adopt a policy whereby substantive discussion of
+technical issues needs to occur on the mailing list.
+
+You might also like to familiarize yourself with other
+[Working Group documents](https://datatracker.ietf.org/wg/core/documents/).