Update Dockerfile

Dockerfile

@@ -48,8 +48,8 @@ RUN echo '#!/bin/bash\n\
           # 1. 启动 frpc (后台运行)\n\
           /usr/local/bin/frpc -f ${FRP_TOKEN} &\n\
           # 2. 前台启动 code-server (保持容器运行)\n\
-          exec code-server /home/coder/cpp_competition' > /start.sh
-RUN chmod +x /start.sh
+          exec code-server /home/coder/cpp_competition' > /home/coder/start.sh
+RUN chmod +x /home/coder/start.sh
 
 # 配置codeserver的语言和扩展
 COPY settings.json /home/coder/.local/share/code-server/User/
@@ -77,4 +77,4 @@ EXPOSE 8080
 EXPOSE 7860
 
 # 将启动脚本设为容器入口
-CMD ["/start.sh"]
+CMD ["/home/coder/start.sh"]