Webapp mvn install not run npm and grunt commands

I downloaded the version 7.11.0 of camunda webapp and tried to do mvn clean install to get the webapp war. Its provide war with complied class files of java but not execute the npm command and grunt build commands.

So each time i have to execute mvn clean install first and then do grunt in order to get the app,lib,plugin folder. But want to do all this in single build command.

To make this as possible, is there any changes i have to do in pom.xml to include npm and grunt execution or need to do mvn install with different command/arguments.