updated readme

diff --git a/README.md b/README.md
index 13dd03c..69a6a30 100644
--- a/README.md
+++ b/README.md

@@ -44,3 +44,8 @@
 You can also run "bazel-bin/cmd/mockserver," which will implement the same API as
 edgemicro-auth, but it will do it locally so that you can test easily. With the mock
 server, "12345" is a valid API key.
+
+## Development Guide
+
+ref:
+https://docs.google.com/a/google.com/document/d/19RoFLwplpVkr606AqORnS4Y12gUb5xZUftBM-upRdX4/edit?usp=sharing