update the CONTRIBUTING readme to point to build instructions
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 6268dcf..b552ddf 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -6,6 +6,12 @@
* [Get involved!](http://www.apache.org/foundation/getinvolved.html)
* [Legal aspects on Submission of Contributions (Patches)](http://www.apache.org/licenses/LICENSE-2.0.html#contributions)
+## If you want to build the project locally ##
+
+For Windows systems, see our detailed instructions on the [CMake README](build/cmake/README.md).
+For Windows Native C++ builds, see our detailed instructions on the [WinCPP
+For unix systems, see our detailed instructions on the [Docker README](build/docker/README.md).
+
## If you want to review open issues... ##
1. Review the [GitHub Pull Request Backlog](https://github.com/apache/thrift/pulls). Code reviews are open to all.