ci: add deployment previews (#111)

.github/pr-deployment-previews.yml

@@ -0,0 +1,28 @@
+on: pull_request
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      deployments: write
+      pull-requests: write 
+   name: Publish to Cloudflare Pages
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Publish to Cloudflare Pages
+        uses: cloudflare/pages-action@v1
+        id: publish
+        with:
+          apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
+          accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
+          projectName: ${{ secrets.CLOUDFLARE_PROJECT_NAME }}
+          directory: public
+
+      - name: Comment
+        uses: thollander/actions-comment-pull-request@v2
+        with:
+          GITHUB_TOKEN: ${{ secrets.PULL_REQUESTS_WRITE }}
+          message: ${{ steps.publish.outputs.alias }}