diff --git a/challenges/shrink-the-image/Dockerfile b/challenges/shrink-the-image/Dockerfile
index 1ac445d..21a1068 100644
--- a/challenges/shrink-the-image/Dockerfile
+++ b/challenges/shrink-the-image/Dockerfile
@@ -1,3 +1,4 @@
+# Starter Dockerfile, unchanged apart from this line.
 FROM python:3.13
 
 RUN apt-get update && apt-get install -y \