update readme.md

add configuration note
Jason-Gew · Jan 30, 2022 · bd7a0e7 · bd7a0e7
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diff --git a/README.md b/README.md
@@ -67,6 +67,12 @@ sudo pip3 install sqlalchemy
 ```
 Or pip install based on _requirements.txt_
 
+### Configuration
+Check config/app-config.ini file, in `mqtt` section, 
+you may update to your own MQTT broker and corresponding settings.
+
+
+
 ### MQTT Command Req and Resp Example
 **Query Client Machine Status**
 ```json