Replace Astro with Jekyll

.github/pull_request_template/blog.md

@@ -20,4 +20,4 @@ Please ensure the following items are completed before requesting review:
 ## Cross-posting Links
 
 - [ ] Published on [renuo.ch/blog](https://renuo.ch/blog)
-- [ ] Published on [dev.to](https://dev.to)
+- [ ] Published on [dev.to](https://dev.to)

.github/workflows/ci.yml

@@ -0,0 +1,18 @@
+name: CI
+
+on:
+  push:
+    branches-ignore: ["main"]
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.3"
+          bundler-cache: true
+      - run: bin/build
+      - run: bin/htmlproofer

.github/workflows/deploy.yml

@@ -0,0 +1,42 @@
+name: Deploy to Pages
+
+on:
+  push:
+    branches: ["main"]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  deploy:
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: "3.3"
+          bundler-cache: true
+      - run: bin/build
+      - uses: actions/configure-pages@v5
+      - uses: actions/upload-pages-artifact@v3
+        with:
+          path: _site/
+      - id: deployment
+        uses: actions/deploy-pages@v4
+      - name: Purge Cloudflare cache
+        if: steps.deployment.outcome == 'success'
+        run: |
+          curl -s -X POST "https://api.cloudflare.com/client/v4/zones/${{ secrets.CLOUDFLARE_ZONE_ID }}/purge_cache" \
+            -H "Authorization: Bearer ${{ secrets.CLOUDFLARE_API_TOKEN }}" \
+            -H "Content-Type: application/json" \
+            --data '{"purge_everything":true}'

.gitignore

@@ -1,24 +1,22 @@
-# build output
-dist/
-# generated types
-.astro/
-
-# dependencies
-node_modules/
+# Jekyll build output
+_site/
+.jekyll-cache/
+.jekyll-metadata
 
-# logs
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-pnpm-debug.log*
+# Bundler
+vendor/
 
+# macOS-specific files
+.DS_Store
 
 # environment variables
 .env
 .env.production
 
-# macOS-specific files
-.DS_Store
-
 # jetbrains setting folder
 .idea/
+
+# Legacy Astro artifacts (to be removed)
+dist/
+.astro/
+node_modules/