message: Docs: add warning about gRPC issue
diff: @@ -4,6 +4,9 @@ Hyperledger Iroha documentation
  .. image:: ../image_assets/iroha_logo.png
  +.. warning::
  + For secure deployment on platforms other than new Linux versions, please read `this note <deploy/index.html#security-notice>`_ first before deploying Iroha in production.
  +
  Welcome! Hyperledger Iroha is a simple blockchain platform you can use to make trusted, secure, and fast applications by bringing the power of permission-based blockchain with Crash fault-tolerant consensus. It's free, open-source, and works on Linux and Mac OS, with a variety of mobile and desktop libraries.
  You can download the source code of Hyperledger Iroha and latest releases from `GitHub page <https://github.com/hyperledger/iroha>`_.
  