Update README.md

README.md

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 # zb-dmn-extension
-Zeebe task worker for DMN. It uses the Camunda DMN engine to evaluate decisions. The decisions are read from a directory (default 'repo').
+Zeebe task worker for DMN. It uses the Camunda DMN engine to evaluate decisions. The decisions are read from local directory.
 
 * register for tasks of type 'DMN'
-* task requires a header 'decisionRef' which holds the id of the decision to evaluate
-* task is completed with payload 'result' which contains the decision result
+* required task header 'decisionRef' => id of the decision to evaluate
+* completes task with payload 'result' which contains the complete decision result
+
+## How to build
+
+Build with Maven
+
+`mvn clean install`
+
+## How to run
+
+Execute the JAR file via
+
+`java -jar target/zeebe-dmn.jar`
+
+## How to configure
+
+You can provide a properties file `application.properties` to configure the Zeebe client and set
+
+* the directory of the DMN repository (default: 'repo')
+* the task topic (default: 'default-topic')