New document (#5299)

* add new doc (#5175)

Co-authored-by: dreamer6680 <146868355@qq.com>

* Test docs (#5235)

* fix: change the page of doc

* chore: add new dependencies, update global styles/layout, optimize docs, add Feishu & GitHub icons, update API examples

* fix: docs/index 404 not found

* Update environment variable names, optimize styles, add new API routes, fix component styles, adjust documentation, and update GitHub and Feishu icons

* update readme

* feat: add a linkfastgpt compontent

* feat: update new doc

* fix:remove unuse page and redirect homepage to docs (#5288)

* fix：remove some unuse doc

* fix: redirect homepage to doc

* git ignore

* fix:navbar to index (#5295)

* sidbar

* fix: navtab unlight (#5298)

* doc

---------

Co-authored-by: dreamer6680 <1468683855@qq.com>
Co-authored-by: dreamer6680 <146868355@qq.com>

document/content/docs/introduction/development/upgrading/483.mdx

@@ -0,0 +1,18 @@
+---
+title: V4.8.3
+description: FastGPT V4.8.3 更新说明
+---
+
+## 升级指南
+
+- fastgpt 镜像 tag 修改成 v4.8.3
+- fastgpt-sandbox 镜像 tag 修改成 v4.8.3
+- 商业版镜像 tag 修改成 v4.8.3
+
+## V4.8.3 更新说明
+
+1. 新增 - 支持 Milvus 数据库， 可参考最新的 [docker-compose-milvus.yml](https://github.com/labring/FastGPT/blob/main/deploy/docker/docker-compose-milvus.yml).
+2. 新增 - 给 chat 接口 empty answer 增加 log，便于排查模型问题。
+3. 新增 - ifelse判断器，字符串支持正则。
+4. 新增 - 代码运行支持 console.log 输出调试。
+5. 修复 - 变量更新在 Debug 模式下出错。