Update README.md

README.md

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 * Download distribution
  * `wget -O agent.zip "https://se4.informatik.uni-wuerzburg.de/nexus/service/local/artifact/maven/redirect?r=snapshots&g=tools.descartes.prisma.agent.wildfly&a=tools.descartes.prisma.agent.wildfly&v=LATEST&c=dist&e=zip"`
 * Unzip archive
- * `unzip agent.zip`
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+ * `unzip agent.zip`
+* Edit configuration file `/opt/wildfly/domain/configuration/domain.xml`
+ * Add extension: 
+```
+<extension module="prisma.agent.wildfly"/>
+```
+ * Add subsystem configuration to profile
+```
+<subsystem xmlns="urn:prisma.agent.wildfly:1.0" repository-host="[Prisma Repository Host]" repository-user="[Prisma Repository User]" repository-password="[Prisma Repository Password]" scope="application/[Application Name]">
+</subsystem>
+```
+  * [Prisma Repository Host], [Prisma Repository User], [Prisma Repository Password] need to be replaced with the values of the repository (Username and Password are the ones configured for RabbitMQ)
+  * [Application Name] can be any String describing the application
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