def call(String containerName, List<String> envVars) {
    container(containerName) {
        script {
            envVars.each {  var ->
                echo "Exporting ${containerName} variable ${var} to Jenkins..."
                env."$var" = sh(script: "echo \$$var", returnStdout: true).trim()
            }
        }
        echo "Finished exporting variables for container ${containerName}"
    }
}