更新 Dockerfile: 添加调试命令以列出平台和后端目录内容，便于排查构建问题。

Dockerfile

@@ -24,6 +24,7 @@ WORKDIR /app
 COPY platform/ ./platform/
 WORKDIR /app/platform
 RUN npm install && npm run build
+RUN ls -l /app/platform
 
 # 安装 http-server
 RUN npm install -g http-server
@@ -33,6 +34,7 @@ WORKDIR /app/back
 COPY back/requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 COPY back/ .
+RUN ls -l /app/back
 
 # supervisor 配置
 COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf