CI: have deploy job do npm ci (was missing)

Author: nbogie

.github/workflows/beta_deploy.yml

@@ -1,4 +1,4 @@
-name: Deploy beta to Netlify
+name: Deploy beta to Cloudflare
 
 on:
   # Trigger the workflow every time you push to the `main` branch
@@ -20,6 +20,8 @@ jobs:
     steps:
       - name: Checkout your repository using git
         uses: actions/checkout@v4
+      - name: Install dependencies
+        run: npm ci
       - name: Build website
         run: npm run build
       - name: Deploy to Cloudflare Workers