Add instructions to serve with filtering to validate site before publishing.
diff --git a/README.md b/README.md
index b3d30cc..1774387 100644
--- a/README.md
+++ b/README.md
@@ -37,6 +37,12 @@
 mvn install
 `
 
+## Jekyll serve (with filtering)
+
+`
+mvn gem:exec@jekyll-serve-filtered
+`
+
 ## Jekyll serve (from source)
 
 `