Add info on build and test

Author: rkpagadala

README.md

@@ -2,8 +2,15 @@
 
 grpc-transcoding is a library that supports [transcoding](https://cloud.google.com/endpoints/docs/transcoding) so that HTTP/JSON can be converted to gRPC.
 
-It helps you to provide your APIs in both gRPC and RESTful style at the same time. The code is used in istio [proxy](https://github.com/istio/proxy)
-to provide HTTP+JSON interface to gRPC service.
+It helps you to provide your APIs in both gRPC and RESTful style at the same time. The code is used in istio [proxy](https://github.com/istio/proxy) to provide HTTP+JSON interface to gRPC service.
+
+The code can be built with the following command
+
+bazel build //...
+
+Tests can be run using
+
+bazel test //...
 
 # Contribution
 See [CONTRIBUTING.md](http://github.com/grpc-ecosystem/grpc-transcoding/blob/master/CONTRIBUTING.md).