chore(docs): migrate the docs site from Fumadocs to Blume (#753)

* Update documentation for ClassroomIO: change Fumadocs to Blume, revise MDX format conventions, and clarify sidebar navigation requirements.

* docs: update README and scripts for improved preview and error handling

* docs: update Discord link in configuration and documentation

* docs: add token-auth route and update documentation formatting

* Fix formatting in auto-comment-issues.yml

* Fix JSON syntax by adding a comma

* fix(docs): declare Blume's Astro build deps so Cloudflare build resolves them

blume build generates an Astro project under apps/docs/.blume/ that imports
astro, @astrojs/mdx, @tailwindcss/vite, tailwindcss, @tailwindcss/typography,
@shikijs/twoslash and @scalar/astro. Under pnpm's isolated node_modules these
are nested inside blume and not resolvable from the docs app, so a clean
--frozen-lockfile build (Cloudflare) fails at 'Cannot find module astro/config'.
Declare them directly in @cio/docs, pinned to blume's resolved versions.

* refactor(docs): update API reference paths and documentation for clarity

* fix: change platofrm url to docs home page

* Refactor documentation for self-hosting ClassroomIO

- Removed the Supabase Cloud setup guide as it is no longer needed.
- Updated the Enterprise SSO documentation to include a reference link for SSO & licensing.
- Added new documentation for Content Security Policy (CSP) configuration.
- Created a new section for configuring SMTP for email notifications.
- Introduced a comprehensive configuration index for self-hosted ClassroomIO, detailing environment variables and their usage.
- Added documentation for optional integrations including Google OAuth, OpenAI, and Unsplash.
- Documented the generation and usage of required secrets for ClassroomIO.
- Created a section for SSO & licensing, detailing the requirements for Enterprise features.
- Added object storage configuration documentation, covering both bundled MinIO and external S3-compatible services.
- Documented versioning and upgrade processes for ClassroomIO.
- Updated the Coolify and Docker self-hosting guides to streamline configuration references and upgrade instructions.
- Enhanced the Railway self-hosting guide with links to relevant configuration sections.
- Updated token authentication documentation to reference SSO & licensing.

* Add comprehensive guides for ClassroomIO features and functionalities

- Introduced a new guide for the Student Dashboard, detailing navigation and features available to students.
- Added a guide on using Tags for organizing and filtering courses within ClassroomIO.
- Created a guide on how to take attendance in courses, including marking attendance and related functionalities.
- Developed a Terminology guide to clarify key terms used throughout ClassroomIO.
- Implemented a Token Auth guide for signing users into ClassroomIO from external applications using JWT.
- Added instructions for using math in the editor with LaTeX support.
- Created a guide for customizing the welcome email sent to students upon enrollment in courses.
- Added a guide explaining what ClassroomIO is and its key features.
- Updated the home documentation to provide a clearer overview of ClassroomIO and its resources.
- Enhanced self-hosted configuration documentation with a new guide for deploying ClassroomIO on Dokploy.
- Updated links in the self-hosted configuration documentation for better navigation.
- Added new images to support the Dokploy deployment guide.
- Updated asset packaging script to handle redirects for the new guide structure.
- Fixed footer link to point to the correct Getting Started guide.

* chore: uprage version

* feat(docs): add DigitalOcean deployment guide and flatten guides structure

- Add a guide for deploying ClassroomIO on DigitalOcean using Docker Compose
  and Caddy for automatic HTTPS.
- List DigitalOcean as a deployment option in the self-hosting index.
- Move guides out of content/docs/guides into content/docs (student-dashboard,
  tags, terminology, token-auth, what-is-classroomio, audience, cohorts,
  community, course, enterprise-sso, mcp, organization, quickstart/*).
- Rename home.mdx to index.mdx.
- Update package-assets script to emit redirects for the old guides paths.

---------

Co-authored-by: Rotimi Best <[email protected]>

apps/docs/README.md

@@ -1,14 +1,48 @@
 # docs
 
-This is a Tanstack Start application generated with
-[Create Fumadocs](https://github.com/fuma-nama/fumadocs).
+The ClassroomIO documentation site, built with [Blume](https://useblume.dev) (Astro + Vite). Served at
+[classroomio.com/docs](https://classroomio.com/docs).
 
-Run development server:
+## Requirements
+
+Node **>= 22.12** (see `.nvmrc`). The rest of the monorepo is still on Node 20, so switch versions
+before working here:
 
 ```bash
-npm run dev
-# or
-pnpm dev
-# or
-yarn dev
+nvm use
 ```
+
+## Develop
+
+```bash
+pnpm dev      # fetches the OpenAPI spec, then starts the dev server
+pnpm build    # builds to dist/, then packages to build/ for the worker
+pnpm preview  # builds, then serves through the worker on :4173
+pnpm validate # checks internal links and heading anchors
+```
+
+Use `pnpm preview` before deploying anything that touches routing. `pnpm dev` serves pages straight
+from Blume and never sees Cloudflare's asset server, so it cannot show you the `_redirects` rules, the
+404 page, or the trailing-slash handling — only `preview` runs the site the way production does.
+
+## How it's served
+
+The site is fully static. `classroomio.com/docs/*` is proxied by the marketing site
+(`apps/website/src/hooks.server.ts`) to the `cio-docs` worker, which serves the build as static
+assets — there is no server-side rendering.
+
+Two things follow from being mounted at `/docs`:
+
+- **Links** are authored root-relative (`/course-enrollment`). Blume prepends the base at build time.
+- **Images** must be written with the base (`/docs/certificates-rules.webp`). Blume deliberately does
+  not rebase images, so an unprefixed path would 404.
+
+`scripts/package-assets.mjs` moves `dist/` under `build/docs/` to match the served path and writes the
+`_redirects` file (`/docs` → `/docs/home`, and the legacy `/docs/how-to-guides/*` → `/docs/*`).
+
+## API reference
+
+`/docs/api` is the Scalar API reference, rendered at build time (the old `/docs/api/reference` path
+301s here). `scripts/fetch-openapi.mjs` pulls the spec from R2 and injects the bearer auth scheme via
+`@cio/utils/openapi/public-api`. Because it is static, a new spec reaches the site only on a rebuild —
+`.github/workflows/upload-openapi-spec.yml` triggers one automatically.