diff --git a/Dockerfile b/Dockerfile
index 0cbfeb9..9a2017e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,8 @@
 FROM python:3.13-slim
+# update Dockerfile for test-of-existing-repo branch
 
 RUN apt-get update && \
-    apt-get install -y --no-install-recommends ca-certificates && \
+    apt-get install -y --no-install-recommends git ca-certificates && \
     rm -rf /var/lib/apt/lists/*
 
 COPY --from=ghcr.io/astral-sh/uv:latest /uv /bin/uv