Update README.md

Author: tianyin

README.md

@@ -1 +1,12 @@
-# openctest
+# openctest
+
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+
+## Overview
+
+This repo releases the prototype and datatsets of the `ctest` paper:
+
+**Testing Configuration Changes in Context to Prevent Production Failures**
+In Proceedings of the 14th USENIX Symposium on Operating Systems Design and Implementation (OSDI'20), Nov. 2020.
+
+We are still working on the documents and the repo will be ready before the OSDI'20 conference.