docs: mention the contributing guide
Change-Id: I9b39d3f01f2973de6cf312e60dee8b6249e7805e
refs: #4414
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`