SLIDER-809 Mention how to build the app-package
diff --git a/app-packages/tomcat/ b/app-packages/tomcat/
index 0121bce..d813b65 100644
--- a/app-packages/tomcat/
+++ b/app-packages/tomcat/
@@ -19,6 +19,15 @@
 Basic instructions on using the Apache Tomcat app-package.
+## Build
+Check out the appropriate branch of slider, and build the project, providing the
+necessary profile activation for the Tomcat app package. You probably also
+want to skip tests. This will place zip file in `app-packages/tomcat/target`
+that will be used later.
+`mvn clean package -DskipTests -Ptomcat-app-package`
 ## Installation
 The Tomcat application package is distributed as a zip archive.