Migrate site from Jekyll to Eleventy

.github/workflows/pages.yml

@@ -0,0 +1,60 @@
+name: Deploy Eleventy site to GitHub Pages
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: pages
+  cancel-in-progress: true
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      - name: Set up Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: 24
+          cache: npm
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Build site
+        run: npm run build
+
+      - name: Configure GitHub Pages
+        if: github.event_name != 'pull_request'
+        uses: actions/configure-pages@v5
+
+      - name: Upload site artifact
+        if: github.event_name != 'pull_request'
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: _site
+
+  deploy:
+    if: github.event_name != 'pull_request'
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.gitignore

@@ -1,7 +1,5 @@
-_site
-_drafts
-.sass-cache
+_site/
+node_modules/
 Thumbs.db
 Desktop.ini
 .DS_Store
-.jekyll-metadata

README.md

@@ -1,9 +1,30 @@
 # karelz.github.io
 
-Source code for https://karelz.github.io. Rendered via Jekyll, hosted by GitHub pages.
+Source for [karelz.github.io](https://karelz.github.io), built with
+[Eleventy](https://www.11ty.dev/) and hosted on GitHub Pages.
 
-See a problem? Please leave a comment, open an issue, or just submit a pull request :)
+## Edit content
 
-## Credits
+Pages are Markdown files in `src/`. Shared page markup is in
+`src/_includes/layouts/base.njk`, and the site styles are in
+`src/assets/site.css`.
 
-Inspired by https://github.com/NickCraver/nickcraver.github.com (with Nick's permission to take his CSS/HTML layout)
+## Preview locally
+
+```powershell
+npm install
+npm run dev
+```
+
+Open <http://localhost:8080>. Eleventy reloads the browser after content or
+style changes.
+
+## Build
+
+```powershell
+npm ci
+npm run build
+```
+
+The generated site is written to `_site/`. Pushes to `master` are deployed by
+the GitHub Pages workflow in `.github/workflows/pages.yml`.