Update step4.md

Adjust the new scenario.

Author: jfclere

operator-image/step4.md

@@ -1,20 +1,27 @@
 ## Edit the source of the webapp
 <https://github.com/jfclere/demo-webapp/blob/master/src/main/java/org/example/tomcat/cloud/TestServlet.java>
 
-## Remove what was deployed
+## Update the war
+
 `cd /root/demo-webapp`{{execute}}
 
-`kubectl delete -f ./custom_resource.yaml`{{execute}}
+`git pull`{{execute}}
 
-## Use the custom resource for the NEW demo-webapp
-`cd /root/demo-webapp`{{execute}}
+`mvn install`{{execute}}
+
+## Update the image
+`cd /root/tomcat-openshift`{{execute}}
+
+`cp /root/demo-webapp/target/demo-1.0.war sample.war`{{execute}}
+
+`mvn install`{{execute}}
 
-`kubectl apply -f ./custom_resource.yaml`{{execute}}
+`docker build -t docker.io/jfclere/tomcat-demo .`{{execute}}
 
-## Set how it is done
-It uses the maven builder from the image: maven:3.8.1-openjdk-8
+`docker push jfclere/tomcat-demo`{{execute}}
 
-The operator mount /mnt in webapp and start the tomcat image.
+## What the operator is doing
+The push in the docker repo triggers a deployment of the new image.
 
 ## the tomcat pods started
 `kubectl get pods`{{execute}}