Adds OSMMON_LOG_LEVEL env var to config log level

Signed-off-by: Benjamin Diaz <bdiaz@whitestack.com>
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 26845d8..e736b50 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -42,6 +42,7 @@
 ENV OS_NOTIFIER_URI localhost:8662
 ENV OS_DEFAULT_GRANULARITY 300
 ENV REQUEST_TIMEOUT 10
+ENV OSMMON_LOG_LEVEL INFO
 
 EXPOSE 8662