📝 update README.

README.md

@@ -12,8 +12,30 @@ All tools will be installed in `bin` directory.
 
 ## Getting started
 
+Run `nwpc_message_client production` to send message for production.
+
+The following message sends GRIB2 production message for GRAPES GFS GMF system 
+via a broker server using by `nwpc_message_client borker`.
+
+```bash
+nwpc_message_client production \
+    --system grapes_gfs_gmf \
+    --production-stream oper \
+    --production-type grib2 \
+    --production-name orig \
+    --event storage \
+    --status completed \
+    --start-time 2019120600 \
+    --forecast-time 3h \
+    --rabbitmq-server=amqp://guest:guest@localhost:5672 \
+    --with-broker \
+    --broker-address=localhost:33384
+```
+
+Please run `nwpc_message_clinet production --help` to get more usage.
+
 ## License
 
-Copyright © 2019, Perilla Roc at nwpc-oper.
+Copyright © 2019-2020, Perilla Roc at nwpc-oper.
 
 `nwpc-message-client` is licensed under [MIT License](LICENSE)