Run yarn_start as part of gradle build

Question

I currently have a Ratpack application which I am using to pass data via an API to a react app. I found an example online that first does a yarn install and then a yarn build, I now want it to do a yarn start whenever I run ./gradlew run so I don't have to start my Ratpack app and then go and seperately start the react application. Is this possible? Here is my current react gradle build script.

plugins {
    id "com.moowork.node" version "1.0.1"
}

apply plugin: "java"

buildDir = new File("gradleBuild")

sourceSets {
    main {
        resources {
            srcDir 'build'
        }
    }
}

task cleanNode() {
    delete 'build'
    delete 'node_modules'
}

processResources.dependsOn = ['yarn_build']
yarn_build.dependsOn = ['yarn_install']
clean.dependsOn("cleanNode"