Jenkinsfile gitversion docker image

Jenkinsfile

//  https://hub.docker.com/layers/gittools/gitversion/5.8.1-alpine.3.14-6.0-amd64/images/sha256-ca0a8c928333b55e976b8c1f7e33b34a9b0884598adad92be2d2e1234b9b28c2?context=explore
scripts {
  def gitversionJson = sh label: 'Running GitVersion.', returnStdout: true, script: 'docker run --rm -v "$(pwd):/repo" gittools/gitversion:5.8.1-alpine.3.14-6.0-amd64 /repo'

  try {
    def gitversionMap = new groovy.json.JsonSlurperClassic().parseText(gitversionJson)
    gitversionMap.each { k, v -> env["${prefix}${k}"] = "${v}" }
  } catch (Exception ex) {
    echo "GitVersion output: \n${gitversionJson}"
    error ex.getMessage()
    throw ex
  }
}