build: recommend boost >= 1.65.1
With this commit, Ubuntu 16.04 is no longer officially supported
and may require manual installation of a newer version of Boost.
Refs: #5087
Change-Id: I17197f72ee8f7cd4d0954658fe57c324076f1311
diff --git a/README.md b/README.md
index c136bac..d26feab 100644
--- a/README.md
+++ b/README.md
@@ -31,8 +31,10 @@
## Contributing
-You're encouraged to contribute to ndn-cxx! Check out the
-[Contributor's Guide](https://github.com/named-data/NFD/blob/master/CONTRIBUTING.md) to get started.
+We greatly appreciate contributions to the ndn-cxx code base.
+If you are new to the NDN software community, please read the
+[Contributor's Guide](https://github.com/named-data/.github/blob/master/CONTRIBUTING.md)
+to get started.
## License