Update README.md

Author: manishrjain

README.md

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 Official Dgraph client implementation for JavaScript (Node.js v6 and above),
 using [gRPC].
 
+**Use [Discuss Issues](https://discuss.dgraph.io/tags/c/issues/35/dgraph-js) for reporting issues about this repository.**
+
 **Looking for browser support? Check out [dgraph-js-http].**
 
 [grpc]: https://grpc.io/