wip: try creating a GitHub Actions workflow file

Author: stefafafan

.github/workflows/branch-preview.yaml

@@ -0,0 +1,29 @@
+name: Deploy Pull Request to GitHub Pages
+
+on:
+  pull_request:
+    types:
+      - opened
+      - synchronize
+      - reopened
+
+jobs:
+  build-and-deploy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout doc-ja
+        uses: actions/checkout@v4
+        with:
+          path: doc-ja
+
+      - name: Checkout phd
+        uses: actions/checkout@v4
+        with:
+          repository: phd/phd
+          path: phd
+
+      - name: Set up PHP
+        uses: shivammathur/setup-php@v2
+        with:
+          php-version: '8.3'
+