🐛 fix PR preview workflow

Author: Jwaminju

.github/workflows/build_pr_preview.yml

@@ -6,7 +6,7 @@ on:
       - main
 
 permissions:
-  contents: write
+  contents: read
   pull-requests: write
   pages: write
   id-token: write
@@ -27,22 +27,23 @@ jobs:
         run: bundle install
 
       - name: Build Jekyll site
-        run: bundle exec jekyll build
+        run: bundle exec jekyll build --baseurl "/pull/${{ github.event.number }}" --destination _site
 
-      - name: Deploy to Preview Branch
-        run: |
-          git config --global user.name "github-actions"
-          git config --global user.email "[email protected]"
-
-          git clone --branch gh-pages https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git preview
-          mkdir -p preview/pull/${{ github.event.number }}
-          cp -r _site/* preview/pull/${{ github.event.number }}/
-          cd preview
-          git add .
-          git commit -m "Deploy PR #${{ github.event.number }} preview"
+      - name: Upload Pages artifact
+        uses: actions/upload-pages-artifact@v4
+        with:
+          path: _site
 
-          git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/${{ github.repository }}.git
-          git push origin gh-pages
+  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@v4
 
       - name: Comment PR with Preview URL
         uses: actions/github-script@v6
@@ -53,5 +54,5 @@ jobs:
               issue_number: context.issue.number,
               owner: context.repo.owner,
               repo: context.repo.repo,
-              body: `🚀 PR Preview: https://${{ github.repository_owner }}.github.io/${{ github.event.repository.name }}/pull/${{ github.event.number }}`
+              body: `🚀 PR Preview: ${{ steps.deployment.outputs.page_url }}`
             })