ci: move daily deployments to Cloudflare (#42)

Rework the Cron GitHub actions to stop running the build by GitHub
and trigger a new deployment on Cloudflare instead.

This removes the inconsistency between pull request previews and cron
deployments, where pull request previews were built by Cloudflare
while cron deployments were built on GitHub.

Additional changes:

- Remove the GHA trigger for the main branch. The Cloudflare integration
  already watches the main branch and creates new deployments after
  a new commit was pushed.

- Add manual trigger to allow us to test the functionality of this
  workflow or to manually re-run it after failures.

Signed-off-by: Miroslav Bajtoš <oss@bajtos.net>

Author: bajtos

.github/workflows/deploy.yml

@@ -1,10 +1,9 @@
-name: Deploy Observable Dashboard to Cloudflare Pages
+name: Trigger Cloudflare Pages Deployment
 
 on:
-  push:
-    branches: [main]
   schedule:
     - cron: '0 4 * * *'
+  workflow_dispatch:
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -25,24 +24,15 @@ jobs:
       - name: Install Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 22
           cache: npm
 
-      - name: Install dependencies
-        run: npm ci
-
-      - name: Build project
-        run: npm run build # Assumes your project has a build script in package.json
-        env:
-          API_TOKEN: ${{ secrets.API_TOKEN }}
-
-      - name: Deploy to Cloudflare Pages
-        uses: cloudflare/pages-action@v1
-        with:
-          apiToken: ${{ secrets.CLOUDFLARE_API_TOKEN }}
-          accountId: ${{ secrets.CLOUDFLARE_ACCOUNT_ID }}
-          projectName: spark-dashboard # Replace with your Cloudflare Pages project name
-          directory: ./dist # Replace with your output directory after build
+      - name: Trigger a new Cloudflare Pages deployment
+        run: |
+          curl --fail-with-body -X POST \
+            -H "Authorization: Bearer {{ secrets.CLOUDFLARE_API_TOKEN }}" \
+            -H "Content-Type: application/json" \
+            https://api.cloudflare.com/client/v4/accounts/{{ secrets.CLOUDFLARE_ACCOUNT_ID }}/pages/projects/spark-dashboard/deployments
 
       - if: failure()
         uses: slackapi/slack-github-action@v2.0.0