How do you run a Jenkins build step in a subdirectory? Easy, just use this block statement.
dir("your-subdir") {
// Your build steps to execute in subdir...
}
20190927/DuckDuckGo jenkins current working directory
20190927/DuckDuckGo jenkinsfile change workspace during execution
20190927/DuckDuckGo jenkinsfile workspace subdirectory
20190927/https://stackoverflow.com/questions/51540060/how-to-access-subdirectory-inside-of-jenkins-workspace