add open-next deployment github workflow

.github/workflows/tmp-cloudflare-open-next-deploy.yml

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+# Security Notes
+# Only selected Actions are allowed within this repository. Please refer to (https://github.com/nodejs/nodejs.org/settings/actions)
+# for the full list of available actions. If you want to add a new one, please reach out a maintainer with Admin permissions.
+# REVIEWERS, please always double-check security practices before merging a PR that contains Workflow changes!!
+# AUTHORS, please only use actions with explicit SHA references, and avoid using `@master` or `@main` references or `@version` tags.
+
+# Note: this is a temporary workflow for deploying the OpenNext version of the site (hosted on https://node-test.org)
+#       this version of the site is just used for testing purposes and ideally we want to keep it in sync with the
+#       official website
+
+name: Deploy the Cloudflare OpenNext test version of the site (https://node-test.org)
+
+on:
+  push:
+    branches:
+      - main
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+  actions: read
+
+jobs:
+  playwright:
+    name: Deploy Open-Next site
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Harden Runner
+        uses: step-security/harden-runner@f4a75cfd619ee5ce8d5b864b0d183aff3c69b55a # v2.13.1
+        with:
+          egress-policy: audit
+
+      - name: Git Checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          fetch-depth: 2
+
+      - name: Set up pnpm
+        uses: pnpm/action-setup@a7487c7e89a18df4991f7f222e4898a00d66ddda # v4.1.0
+
+      - name: Set up Node.js
+        uses: actions/setup-node@a0853c24544627f65ddf259abe73b1d18a591444 # v5.0.0
+        with:
+          # We want to ensure that the Node.js version running here respects our supported versions
+          node-version-file: '.nvmrc'
+          cache: 'pnpm'
+
+      - name: Install packages
+        run: pnpm install --frozen-lockfile
+
+      - name: Build open-next site
+        working-directory: apps/site
+        run: node --run cloudflare:build:worker
+
+      - name: Deploy open-next site
+        working-directory: apps/site
+        run: node --run cloudflare:deploy
+        env:
+          CF_WORKERS_SCRIPTS_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN_FOR_OPEN_NEXT_SITE }}
+          CLOUDFLARE_API_TOKEN: ${{ secrets.CLOUDFLARE_API_TOKEN_FOR_OPEN_NEXT_SITE }}