Enable user metrics (#196)

diff --git a/docker-compose/docker-whisk-controller.env b/docker-compose/docker-whisk-controller.env
index 6f4f0c3..60704ed 100644
--- a/docker-compose/docker-whisk-controller.env
+++ b/docker-compose/docker-whisk-controller.env
@@ -39,6 +39,8 @@
 CONFIG_whisk_loadbalancer_invokerUserMemory=1024m
 CONFIG_whisk_containerPool_userMemory=1024m
 
+CONFIG_whisk_userEvents_enabled=true
+
 CONTROLLER_BLACKBOXFRACTION=0.10
 CONTROLLER_OPTS=-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.port=1098 -Xdebug -Xrunjdwp:transport=dt_socket,address=9222,server=y,suspend=n
 CONTROLLER_HA=False