add port prompt

jenkins.yaml

@@ -4,6 +4,14 @@
   become: true
 
   tasks:
+
+    - name: Set JENKINS_PORT variable
+    vars_prompt:
+      - name: JENKINS_PORT
+        prompt: "Please enter the value for JENKINS_PORT"
+        private: no
+        when: JENKINS_PORT is not defined or JENKINS_PORT == ""
+ 
     - name: Add Jenkins repository key
       rpm_key:
         state: present