chore: retire Docusaurus site, rewrite README for the Astro docs

The docs now live in site/ (Astro + Starlight) and deploy from there
(#400/#401). Remove the superseded website/ Docusaurus project, and:
- rewrite README.md around site/ + cookbook/ (was Docusaurus instructions)
- Makefile `serve` now runs the Astro dev server
- test-deploy workflow builds site/ on PRs to master (was website/ on `main`,
  which never ran) with npm ci --ignore-scripts

Verified: go test ./... passes, site builds clean (124 pages).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: vishr

.github/workflows/test-deploy.yaml

@@ -1,26 +1,29 @@
-name: Test deployment
+name: Test build
 
 on:
   pull_request:
     branches:
-      - main
-    # Review gh actions docs if you want to further define triggers, paths, etc
-    # https://docs.github.com/en/actions/using-workflows/workflow-syntax-for-github-actions#on
+      - master
 
 jobs:
-  test-deploy:
-    name: Test deployment
+  test-build:
+    name: Test build (docs site)
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     steps:
       - uses: actions/checkout@v5
       - uses: actions/setup-node@v6
         with:
           node-version: 24
-          cache: yarn
+          cache: npm
+          cache-dependency-path: site/package-lock.json
 
       - name: Install dependencies
-        run: yarn install --frozen-lockfile
-        working-directory: website
-      - name: Test build website
-        run: yarn build
-        working-directory: website
+        run: npm ci --ignore-scripts
+        working-directory: site
+      - name: Test build
+        run: npm run build
+        working-directory: site
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Makefile

@@ -2,6 +2,6 @@ test:
 	go test -race ./...
 
 serve:
-	docker run --rm -it --name echo-docs -v ${CURDIR}/website:/home/app -w /home/app -p 3000:3000 -u node node:lts /bin/bash -c "npm install && npm start -- --host=0.0.0.0"
+	cd site && npm install && npm run dev
 
 .PHONY: test serve

README.md

@@ -1,27 +1,51 @@
-# Echo Extra
+# echox
 
-### Running Recipes
+Source for the [Echo](https://github.com/labstack/echo) documentation site —
+published at **[echo.labstack.com](https://echo.labstack.com)** — together with
+the runnable cookbook recipes the docs reference.
 
-- Go into any cookbook folder and run `go run server.go`
+## Layout
 
-### Running/Developing Website Locally
+| Path        | What it is                                                                                          |
+| ----------- | --------------------------------------------------------------------------------------------------- |
+| `site/`     | The docs site — [Astro](https://astro.build) + [Starlight](https://starlight.astro.build). Content lives in `site/src/content/docs/`. |
+| `cookbook/` | Standalone, runnable Go example apps referenced from the docs.                                       |
+| `docs/`     | Internal design specs.                                                                               |
 
-- Ensure that you have Node.js installed on your computer. If you don't have it, download and install it from the
-  official Node.js website (https://nodejs.org). Or you could use NVM (https://github.com/nvm-sh/nvm) to use appropriate
-  version of Node.
-- Inside the `website` folder, install the required dependencies by running the following command `npm install`.
-- Run the website locally by running the following command `npm start`.
+## Documentation site
+
+Requires [Node.js](https://nodejs.org) (LTS).
 
 ```bash
-cd website
+cd site
 npm install
-npm start
+npm run dev      # dev server at http://localhost:4321
+npm run build    # production build to site/dist
+npm run preview  # preview the production build
 ```
 
-### Running/Developing Website in docker
+Content is Markdown/MDX under `site/src/content/docs/` (`guide/`, `middleware/`,
+`cookbook/`). To add a page, drop a file in the right folder — the sidebar is
+generated from each page's `sidebar.order` frontmatter. Every page needs a
+`title` and `description`.
+
+## Cookbook recipes
 
-This will serve website on http://localhost:3000/
+Each folder under `cookbook/` is a self-contained example. Run one with:
 
 ```bash
-docker run --rm -it --name echo-docs -v ${PWD}/website:/home/app -w /home/app -p 3000:3000 -u node node:lts /bin/bash -c "npm install && npm start -- --host=0.0.0.0"
+cd cookbook/hello-world
+go run .
 ```
+
+## Deployment
+
+The site auto-deploys to GitHub Pages on every push to `master` (and once daily,
+to refresh build-time data such as the GitHub star count) via
+[`.github/workflows/deploy.yaml`](.github/workflows/deploy.yaml). Dependencies
+are installed with `npm ci --ignore-scripts` and pinned via the committed
+lockfile.
+
+## License
+
+[MIT](LICENSE)