I add the target directory to the gitignore file.
diff --git a/demos/jemo-trader-app/.gitignore b/demos/jemo-trader-app/.gitignore
index 29b636a..6b53470 100644
--- a/demos/jemo-trader-app/.gitignore
+++ b/demos/jemo-trader-app/.gitignore
@@ -1,2 +1,3 @@
 .idea
-*.iml
\ No newline at end of file
+*.iml
+/target
\ No newline at end of file