[nobug] update README

Change-Id: I542fe3b4a73bcef048a7a56971c7ba4f5ed248cf

plugins/org.eclipse.wst.server.preview/jetty/README.md

diff --git a/plugins/org.eclipse.wst.server.preview/jetty/README.md b/plugins/org.eclipse.wst.server.preview/jetty/README.md
index a3de973..661605d 100644
--- a/plugins/org.eclipse.wst.server.preview/jetty/README.md
+++ b/plugins/org.eclipse.wst.server.preview/jetty/README.md
@@ -4,4 +4,6 @@
 
 Since Jetty already builds its jars as bundles, the current setup
 mainly renames the jars and should leave the bundle headers unchanged,
-at least until the signing happens.
\ No newline at end of file
+at least until the signing happens.
+
+To build, run Maven with e.g.: -DjettyVersion=10.0.11 clean p2:site install