Add dockerfile argument for jenkins job

Change-Id: I933be24f17be8ad605ccf80a003cd9f07f535db6
diff --git a/jenkins/client/job/docker/init.yml b/jenkins/client/job/docker/init.yml
index 64dc03f..63c3f27 100644
--- a/jenkins/client/job/docker/init.yml
+++ b/jenkins/client/job/docker/init.yml
@@ -21,6 +21,7 @@
             - name: jenkins
               branch: "master"
               tags: ""
+              dockerfile: "Dockerfile"
             - name: jenkins
               branch: "2.32.3"
               tags: "2.32"