test sub-docker

.jenkinsfile

@@ -1,5 +1,8 @@
 pipeline {
-  agent any
+  //agent any
+  agent {
+    docker { image 'archlinux:base-devel' }
+  }
   options {
     timeout(time: 30, unit: 'MINUTES')
     disableConcurrentBuilds abortPrevious: true
@@ -27,6 +30,7 @@ pipeline {
     }
     stage('(prod) Build') {
       steps {
+        sh 'pacman -S jdk-openjdk maven'
         sh 'mvn install'
       }
     }