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Before you start, make sure you have the following:
  1. A GitHub account
  2. A Render account (free tier works)
  3. A Firebase account (free Spark plan works)
  4. A WhatsApp account on your phone
  5. An UptimeRobot account (free)

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How it fits together

  • Backend (Render + Docker) — runs the Baileys WhatsApp listener, authenticates the frontend, and writes messages to Firestore
  • Database (Firebase Firestore) — stores your chat logs
  • Frontend (index.html) — a single static file you host anywhere (Firebase Hosting, GitHub Pages, Netlify, Vercel). It never talks to Firestore directly — it authenticates against and streams chat data from your Render backend only
  • UptimeRobot — pings your Render backend every 5 minutes so the free tier doesn’t spin down from inactivity
Continue to Firebase Setup.

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