Update Algolia index with GH Actions

.github/workflows/build.yml

@@ -0,0 +1,47 @@
+name: build
+
+on:
+  push:
+    branches:
+      - master
+  workflow_dispatch: {}
+  repository_dispatch: {}
+
+jobs:
+  build:
+    if: github.repository == 'mmistakes/minimal-mistakes'
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: '3.2'
+    - name: Setup cache for Bundler
+      id: cache
+      uses: actions/cache@v4
+      with:
+        path: |
+          docs/Gemfile.lock
+          docs/vendor/bundle
+        key: ${{ runner.os }}-bundler-${{ hashFiles('docs/Gemfile') }}
+        restore-keys: |
+          ${{ runner.os }}-bundler-
+
+    - name: Install - Bundler
+      env:
+        MAKE: make -j2
+      working-directory: docs/
+      run: |
+        bundle config set path vendor/bundle
+        bundle install --jobs=4 --retry=3
+        bundle clean
+
+    - name: Update Algolia index
+      working-directory: docs/
+      run: bundle exec jekyll algolia push
+      env:
+        ALGOLIA_API_KEY: ${{ secrets.ALGOLIA_API_KEY }}
+      continue-on-error: true

CHANGELOG.md

@@ -13,6 +13,10 @@
 - Replace a redirected link to MadeMistakes in footer. [#4882](https://github.com/mmistakes/minimal-mistakes/pull/4882)
 - Fix wrong float direction for `feature_row` with `type="right"`. [#4061](https://github.com/mmistakes/minimal-mistakes/issues/4061)
 
+### Documentation & Maintenance
+
+- Automatically update Algolia search index with GitHub Actions.
+
 ## [4.26.2](https://github.com/mmistakes/minimal-mistakes/releases/tag/4.26.2)
 
 ### Enhancements

docs/_docs/18-history.md

@@ -5,7 +5,7 @@ permalink: "/docs/history/"
 excerpt: Change log of enhancements and bug fixes made to the theme.
 sidebar:
   nav: docs
-last_modified_at: '2024-06-25T23:56:59+08:00'
+last_modified_at: '2024-06-27T21:13:13+08:00'
 toc: false
 ---
 
@@ -28,6 +28,10 @@ toc: false
 - Replace a redirected link to MadeMistakes in footer. [#4882](https://github.com/mmistakes/minimal-mistakes/pull/4882)
 - Fix wrong float direction for `feature_row` with `type="right"`. [#4061](https://github.com/mmistakes/minimal-mistakes/issues/4061)
 
+### Documentation & Maintenance
+
+- Automatically update Algolia search index with GitHub Actions.
+
 ## [4.26.2](https://github.com/mmistakes/minimal-mistakes/releases/tag/4.26.2)
 
 ### Enhancements