Use Vuepress to generate a static site for docs.

docs/.vuepress/config.ts

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+import { defineUserConfig, defaultTheme } from 'vuepress'
+import {
+    navbarEn,
+    navbarZh,
+    sidebarEn,
+    sidebarZh,
+  } from './configs/index.js'
+
+export default defineUserConfig({
+  title: 'ChatGPT UI',
+  description: 'A ChatGPT web client',
+  base: '/chatgpt-ui/',
+  locales: {
+    // 键名是该语言所属的子路径
+    // 作为特例，默认语言可以使用 '/' 作为其路径。
+    '/': {
+      lang: 'en-US',
+      description: 'A ChatGPT web client',
+    },
+    '/zh/': {
+      lang: 'zh-CN',
+      description: '一个 ChatGPT 的 Web 客户端',
+    },
+  },
+  theme: defaultTheme({
+    locales: {
+      '/': {
+        // navbar
+        navbar: navbarEn,
+        // sidebar
+        sidebar: sidebarEn,
+      },
+      '/zh/': {
+        // navbar
+        navbar: navbarZh,
+        selectLanguageName: '简体中文',
+        selectLanguageText: '选择语言',
+        selectLanguageAriaLabel: '选择语言',
+        // sidebar
+        sidebar: sidebarZh,
+        // 404 page
+        notFound: [
+            '这里什么都没有',
+            '我们怎么到这来了？',
+            '这是一个 404 页面',
+            '看起来我们进入了错误的链接',
+        ],
+        backToHome: '返回首页',
+        // a11y
+        openInNewWindow: '在新窗口打开',
+        toggleColorMode: '切换颜色模式',
+        toggleSidebar: '切换侧边栏',
+      },
+    },
+  }),
+})

docs/.vuepress/configs/index.ts

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+export * from './navbar/index.js'
+export * from './sidebar/index.js'

docs/.vuepress/configs/navbar/en.ts

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+import type { NavbarConfig } from '@vuepress/theme-default'
+
+export const navbarEn: NavbarConfig = [
+  {
+    text: 'Guide',
+    link: '/',
+  },
+  {
+    text: 'Changelog',
+    link: 'https://github.com/WongSaang/chatgpt-ui/releases'
+  }
+]

docs/.vuepress/configs/navbar/index.ts

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+export * from './en.js'
+export * from './zh.js'

docs/.vuepress/configs/navbar/zh.ts

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+import type { NavbarConfig } from '@vuepress/theme-default'
+
+export const navbarZh: NavbarConfig = [
+  {
+    text: '指南',
+    link: '/zh/',
+  },
+  {
+    text: '更新日志',
+    link: 'https://github.com/WongSaang/chatgpt-ui/releases',
+  }
+]

docs/.vuepress/configs/sidebar/en.ts

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+import type { SidebarConfig } from '@vuepress/theme-default'
+
+export const sidebarEn: SidebarConfig = {
+  '/': [
+    {
+      text: 'Guide',
+      children: [
+        '/README.md',
+        '/guide/quick-start.md',
+        '/guide/configuration.md',
+        '/guide/problems.md',
+        '/guide/development.md',
+        '/guide/buymeacoffee.md',
+      ],
+    },
+  ]
+}

docs/.vuepress/configs/sidebar/index.ts

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+export * from './en.js'
+export * from './zh.js'

docs/.vuepress/configs/sidebar/zh.ts

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+import type { SidebarConfig } from '@vuepress/theme-default'
+
+export const sidebarZh: SidebarConfig = {
+  '/zh/': [
+    {
+      text: '指南',
+      children: [
+        '/zh/README.md',
+        '/zh/guide/quick-start.md',
+        '/zh/guide/configuration.md',
+        '/zh/guide/problems.md',
+        '/zh/guide/development.md',
+        '/zh/guide/buymeacoffee.md',
+      ],
+    },
+  ]
+}