build.gradle

task ngUpdate(type: Exec) {
 executable 'docker'
 args 'run', '--rm', '-v', "${projectDir}/webapp:/app", 'trion/ng-cli:10.2.0', 'ng', 'update'
 outputs.dir "${projectDir}/webapp/node_modules"
}

task npmInstall(type: Exec) {
 executable 'docker'
 args 'run', '--rm', '-v', "${projectDir}/webapp:/app", 'trion/ng-cli:10.2.0', 'npm', 'install'
 outputs.dir "${projectDir}/webapp/node_modules"
}

task angularBuild(type: Exec) {
 executable 'docker'
 args 'run', '--rm', '-v', "${projectDir}/webapp:/app", 'trion/ng-cli:10.2.0', 'ng', 'build'
 outputs.dir "${projectDir}/webapp/dist"
 dependsOn npmInstall
}

task build {
 dependsOn angularBuild
}


task uninstallTypescript (type: Exec) {
 executable 'docker'
 args 'run', '--rm', '-v', "${projectDir}/webapp:/app", 'trion/ng-cli:10.2.0', 'npm', 'uninstall', 'typescript'
}

task installTypescript (type: Exec) {
 executable 'npm'
 args 'run', '--rm', '-v', "${projectDir}/webapp:/app", 'trion/ng-cli:10.2.0', 'npm', 'install', '--save-dev', 'typescript@4.0.6'
 dependsOn uninstallTypescript
}

task typescript {
    dependsOn installTypescript
}