fix(Dockerfile): 修正nginx目录权限设置错误

将nginx目录的所有者从nginx:nginx改为user，确保容器运行时权限一致

Dockerfile

@@ -23,7 +23,7 @@ RUN pip install --no-cache-dir --upgrade -r requirements.txt
 
 COPY --chown=user . /app
 RUN chmod +x /app/scripts/start.sh
-RUN chown -R nginx:nginx /var/lib/nginx
+RUN chown=user -R /var/lib/nginx
 RUN chmod -R 755 /var/lib/nginx
 
 # 暴露端口