update[doc]

.gitbook.yaml

+structure:
+  readme: README.md
+  summary: doc/README.md
\ No newline at end of file

doc/README.md

+# Table of Contents
+
+* [介绍](../README.md)
+* [更新日志](../CHANGELOG.md)
+* [贡献指南](../CONTRIBUTE.md)
+* [1. 系统架构](./1.md)
+* [2. 基础平台](./2.md)
+* [3. 小商场](./3.md)
+* [4. 管理后台](./4.md)
+* [5. 商场](./5.md)
+* [6. 下一步计划](./6.md)
+* [7. FAQ](./7.md)
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