Gradle task

build.gradle

node {
    version = '12.12.0'

    yarnVersion = '1.15.2'

    download = false

    yarnWorkDir = file("${project.buildDir}/yarn")

    nodeModulesDir = file("${project.projectDir}/../frontend")
}

task appYarnInstall(type: YarnTask) {
    description = "Installs all dependencies from package.json"
    workingDir = file("${project.projectDir}/../frontend")
    args = ["install"]
}

task appYarnBuild(type: YarnTask) {
    description = "Builds production version of the travel-mania frontend"
    workingDir = file("${project.projectDir}/../frontend")
    args = ["build"]
}

task copyWebApp(type: Copy) {
    from "${project.projectDir}/../frontend/build/"
    into "${project.buildDir}/resources/main/static/."
}

appYarnBuild.dependsOn appYarnInstall
copyWebApp.dependsOn appYarnBuild
compileJava.dependsOn copyWebApp