From 6a55219310194c9fed2cbbb10fd0a857a79fef1a Mon Sep 17 00:00:00 2001
From: yeasy <yangbaohua@gmail.com>
Date: Sat, 23 May 2026 21:27:01 -0700
Subject: [PATCH] fix(11.3): use COPY (not ADD) in Flask/Redis intro Dockerfile
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§7.3 of this book explicitly recommends COPY over ADD for simple
file copies ("在大多数情况下，你应该使用 COPY，而不是 ADD"). The intro
Compose example showed ADD without needing tar extraction or URL
download, contradicting the canonical guidance. Switched to COPY
so the first Dockerfile readers see matches the rule the book
teaches a few chapters later.
---
 11_compose/11.3_usage.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/11_compose/11.3_usage.md b/11_compose/11.3_usage.md
index 9ca177f..7abedca 100644
--- a/11_compose/11.3_usage.md
+++ b/11_compose/11.3_usage.md
@@ -42,7 +42,7 @@ if __name__ == "__main__":
 
 ```docker
 FROM python:3.12-alpine
-ADD . /code
+COPY . /code
 WORKDIR /code
 RUN pip install redis flask
 CMD ["python", "app.py"]