Update dev.jenkinsfile

jenkinsfile/dev.jenkinsfile

@@ -12,7 +12,15 @@ pipeline {
         
     }
     stages {
-        
+            
+        stage("Clean Workspace"){
+            steps{
+                sh("ls -al ${env.WORKSPACE}")
+                deleteDir()
+                sh("ls -al ${env.WORKSPACE}")
+            }
+            
+        }
         stage("Git"){
             steps{
                 timeout(time:5, unit:"MINUTES"){