feat: add GitHub Actions workflow for Jekyll deployment to GitHub Pages

Author: christoph2806

.github/workflows/deploy-docs.yml

@@ -0,0 +1,57 @@
+name: Deploy Jekyll Documentation to GitHub Pages
+
+on:
+  push:
+    branches: [ main ]
+    paths: [ 'docs/**' ]
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  pages: write
+  id-token: write
+
+concurrency:
+  group: "pages"
+  cancel-in-progress: false
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.1'
+          bundler-cache: true
+          working-directory: docs
+
+      - name: Setup Pages
+        id: pages
+        uses: actions/configure-pages@v3
+
+      - name: Build with Jekyll
+        working-directory: docs
+        run: |
+          bundle exec jekyll build --baseurl "${{ steps.pages.outputs.base_path }}"
+        env:
+          JEKYLL_ENV: production
+
+      - name: Upload artifact
+        uses: actions/upload-pages-artifact@v2
+        with:
+          path: docs/_site
+
+  deploy:
+    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@v2 

docs/Gemfile

@@ -0,0 +1,28 @@
+source "https://rubygems.org"
+
+gem "jekyll", "~> 4.3.0"
+gem "minimal-mistakes-jekyll"
+gem "jekyll-feed"
+gem "jekyll-sitemap"
+gem "jekyll-gist"
+gem "jekyll-include-cache"
+
+group :jekyll_plugins do
+  gem "jekyll-paginate"
+  gem "jekyll-archives"
+  gem "jekyll-redirect-from"
+end
+
+# Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
+# and associated library.
+platforms :mingw, :x64_mingw, :mswin, :jruby do
+  gem "tzinfo", ">= 1", "< 3"
+  gem "tzinfo-data"
+end
+
+# Performance-booster for watching directories on Windows
+gem "wdm", "~> 0.1.1", :platforms => [:mingw, :x64_mingw, :mswin]
+
+# Lock `http_parser.rb` gem to `v0.6.x` on JRuby builds since newer versions of the gem
+# do not have a Java counterpart.
+gem "http_parser.rb", "~> 0.6.0", :platforms => [:jruby]