[keycloak-user] How to build the war?

I am trying to deploy on tomcat, following this section: http://keycloak.github.io/docs/userguide/keycloak-server/html/ch08.html#t... I am stuck here: "The first thing you must do is create a META-INF/context.xml file in your WAR package." Q: How can I generate the war?? Or should I just DL it (and where in that case)? PS: Already did a git clone + mvn install (but then I don't know what to do)