version_number

Jenkinsfile

@@ -17,7 +17,8 @@ pipeline {
     stage('Building image') {
       steps{
         script {
-            dockerImage = docker.build imagename
+            version_info=sh(script: "git rev-parse --short HEAD", returnStdout: true)
+            dockerImage = docker.build(imagename, '--build-arg "version_info=${version_info}" .') imagename
         }
       }
     }