From a7fc2e49f0de1e3254d43e7703f563147bce96df Mon Sep 17 00:00:00 2001
From: v6ole <voole@vip.qq.com>
Date: Tue, 4 Aug 2026 16:05:34 +0800
Subject: [PATCH] build: use domestic Debian mirror

---
 backend/Dockerfile | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/backend/Dockerfile b/backend/Dockerfile
index 33a57a9..2bbc64a 100644
--- a/backend/Dockerfile
+++ b/backend/Dockerfile
@@ -1,6 +1,9 @@
 FROM python:3.12-slim
 
-RUN apt-get update && apt-get install -y --no-install-recommends \
+ARG APT_MIRROR=mirrors.tuna.tsinghua.edu.cn
+RUN sed -i "s|deb.debian.org|${APT_MIRROR}|g; s|security.debian.org|${APT_MIRROR}|g" \
+      /etc/apt/sources.list /etc/apt/sources.list.d/*.sources 2>/dev/null || true \
+    && apt-get update && apt-get install -y --no-install-recommends \
     fping iputils-ping && \
     rm -rf /var/lib/apt/lists/*