docs: mention the contributing guide

Change-Id: I9b39d3f01f2973de6cf312e60dee8b6249e7805e
refs: #4414
diff --git a/README-dev.md b/README-dev.md
index d2cc54a..d9af4c9 100644
--- a/README-dev.md
+++ b/README-dev.md
@@ -1,6 +1,9 @@
 Notes for ndn-cxx developers
 ============================
 
+If you are new to the NDN community of software generally, read the
+[Contributor's Guide](https://github.com/named-data/NFD/blob/master/CONTRIBUTING.md).
+
 Code style
 ----------
 
diff --git a/README.md b/README.md
index bf20179..ef39232 100644
--- a/README.md
+++ b/README.md
@@ -26,6 +26,9 @@
 Extensive documentation of the library is available on the library's homepage:
 http://www.named-data.net/doc/ndn-cxx/
 
+If you are new to the NDN community of software generally, read the
+[Contributor's Guide](https://github.com/named-data/NFD/blob/master/CONTRIBUTING.md).
+
 ## License
 
 ndn-cxx is an open source project licensed under LGPL 3.0 license. For more information about
diff --git a/docs/index.rst b/docs/index.rst
index f9c7351..8f5dca8 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -37,6 +37,8 @@
 
 - :doc:`tutorials`
 
+   + `NDN Software Contributor's Guide <https://github.com/named-data/NFD/blob/master/CONTRIBUTING.md>`__ (guide for newcomers to the NDN community of software generally)
+
    + :doc:`tutorials/utils-ndn-regex`
    + :doc:`tutorials/security-validator-config`