1How to install the Appengine SDK to the Maven local repository? 2Note that this needs to be done only once. 3 $ mvn gae:unpack 4 Note that you don't need to manually download any SDK. 5 6How to generate the WAR? 7 $ mvn package 8 $ mvn war:war 9 Note that this must be done before running the webapp locally and before 10 deploying it to Appengine. 11 12How to run the webapp locally? 13 $ mvn gae:run 14 15How to deploy the webapp to Appengine? 16 $ mvn gae:update 17 18If you have made any changes to the code or pom.xml file of demo here, 19you may need to run Maven commands like ```mvn clean install -U``` 20(especially one hierarchy above i.e at java/ folder) to resolve any 21dependency issues w.r.t new developement version. 22