ci: automate GitHub Pages deployment

.github/workflows/github-pages-deploy.yml

@@ -0,0 +1,59 @@
+name: Deploy to GitHub Pages
+
+on:
+  pull_request:
+    branches:
+      - main
+#  push:
+#    branches:
+#      - main
+
+defaults:
+  run:
+    working-directory: ./website
+
+jobs:
+  build:
+    name: Build Docusaurus
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 18
+          cache: yarn
+
+      - name: Build prettier-java-plugin
+        working-directory: ./packages/prettier-plugin-java
+        run: yarn build
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+      - name: Build website
+        run: yarn build
+
+      - name: Upload Build Artifact
+        uses: actions/upload-pages-artifact@v3
+        with:
+          path: build
+
+  deploy:
+    name: Deploy to GitHub Pages
+    needs: build
+
+    # Grant GITHUB_TOKEN the permissions required to make a Pages deployment
+    permissions:
+      pages: write # to deploy to Pages
+      id-token: write # to verify the deployment originates from an appropriate source
+
+    # Deploy to the github-pages environment
+    environment:
+      name: github-pages
+      url: ${{ steps.deployment.outputs.page_url }}
+
+    runs-on: ubuntu-latest
+    steps:
+      - name: Deploy to GitHub Pages
+        id: deployment
+        uses: actions/deploy-pages@v4

.github/workflows/github-pages-test.yml

@@ -0,0 +1,31 @@
+name: Test deployment
+
+on:
+  pull_request:
+    branches:
+      - main
+
+defaults:
+  run:
+    working-directory: ./website
+
+jobs:
+  test-deploy:
+    name: Test deployment
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 18
+          cache: yarn
+
+      - name: Build prettier-java-plugin
+        working-directory: ./packages/prettier-plugin-java
+        run: yarn build
+      - name: Install dependencies
+        run: yarn install --frozen-lockfile
+      - name: Test build website
+        run: yarn build