Update Dockerfile

Dockerfile

@@ -49,6 +49,12 @@ EOF
 RUN sed -i 's/^user\s/#user /g' /etc/nginx/nginx.conf && \
     sed -i 's|pid\s*/var/run/nginx.pid;|pid /tmp/nginx.pid;|g' /etc/nginx/nginx.conf
 
+# 在 RUN cat > /start.sh 之前添加
+RUN echo "Checking directory structure..." && \
+    ls -la /usr/share/nginx/html || echo "No html dir" && \
+    ls -la /app || echo "No app dir" && \
+    find / -name "index.html" 2>/dev/null | head -5 || echo "No index.html found"
+
 # 创建启动脚本
 RUN cat > /start.sh <<'EOF'
 #!/bin/sh