Set node to run on label docker

Signed-off-by: Mike Marchetti <mmarchetti@sandvine.com>
diff --git a/Jenkinsfile b/Jenkinsfile
index f2e0417..6afef69 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -16,7 +16,7 @@
     }
 }
 
-node {
+node('docker') {
     checkout scm
     devops_checkout()