diff --git a/Home.md b/Home.md
index 31f41ff..40cdf2f 100644
--- a/Home.md
+++ b/Home.md
@@ -9,3 +9,4 @@ Dockerfile Best Practices
 - Avoid unnecessary softwares/layers
 - Always `RUN set -xe && ...` to verbose
 - Use `docker-compose` to manage
+- Use official docker images