write pr & commit redirect

.github/workflows/preview.yml

@@ -66,6 +66,14 @@ jobs:
           mkdir -p .vercel/output/static/playground
           pnpm build-playground
           cp -r prismarine-viewer/dist/* .vercel/output/static/playground/
+      - name: Write pr redirect index.html
+        run: |
+          mkdir -p .vercel/output/pr
+          echo "<meta http-equiv='refresh' content='0;url=https://github.com/${{ github.repository }}/pull/${{ github.event.issue.number }}'>" > .vercel/output/pr/index.html
+      - name: Write commit redirect index.html
+        run: |
+          mkdir -p .vercel/output/commit
+          echo "<meta http-equiv='refresh' content='0;url=https://github.com/${{ github.repository }}/pull/${{ github.event.issue.number }}/commits/${{ github.sha }}'>" > .vercel/output/commit/index.html
       - name: Download Generated Sounds map
         run: node scripts/downloadSoundsMap.mjs
       - name: Deploy Project Artifacts to Vercel