Update Dockerfile

Dockerfile

@@ -1,11 +1,5 @@
 FROM python:3.11-slim
 
-# 设置为中国国内源（针对 Bookworm/Debian 12）
-RUN rm -rf /etc/apt/sources.list.d/* && \
-    echo "deb http://mirrors.ustc.edu.cn/debian bookworm main" > /etc/apt/sources.list && \
-    echo "deb http://mirrors.ustc.edu.cn/debian bookworm-updates main" >> /etc/apt/sources.list && \
-    echo "deb http://mirrors.ustc.edu.cn/debian-security bookworm-security main" >> /etc/apt/sources.list
-
 WORKDIR /app
 
 # Install system dependencies
@@ -44,7 +38,7 @@ RUN apt-get update && apt-get install -y \
 
 # Copy requirements first to leverage Docker cache
 COPY requirements.txt .
-RUN pip install --no-cache-dir -r requirements.txt -i https://pypi.tuna.tsinghua.edu.cn/simple
+RUN pip install --no-cache-dir -r requirements.txt
 
 # Copy the rest of the application
 COPY . .