Monitors El Al flight prices over a configurable date window and emails you when prices drop below your threshold.

1. Create an alert with origin, destination, date window, trip duration, and max price
2. The backend polls Duffel every 6 hours, sliding the date window to find the cheapest available El Al flight
3. Price history is saved to Postgres and charted in the UI
4. You get an email when a price at or below your threshold is found

• Backend: Node.js + Express + TypeScript, node-cron scheduler, Duffel API, SendGrid
• Frontend: Next.js (App Router), Recharts
• Database: PostgreSQL
• Infrastructure: Docker Compose

• Node.js 18+
• PostgreSQL (local) or Docker

1. Clone and install dependencies

   cd backend && npm install
   cd ../frontend && npm install

2. Configure environment

   Create backend/.env:

   DUFFEL_API_KEY=duffel_test_xxx
   DATABASE_URL=postgresql://username@localhost:5432/elal_finder
   SENDGRID_API_KEY=SG.xxx
   FROM_EMAIL=[email protected]
   POLL_INTERVAL_HOURS=6
   # Leave AIRLINE_IATA unset for sandbox (Duffel Airways); set to LY for production

   Create frontend/.env.local:

   NEXT_PUBLIC_API_URL=http://localhost:3001
   API_URL=http://localhost:3001

3. Run migrations and start

   cd backend && npm run migrate && npm run dev
   cd frontend && npm run dev

   Frontend: http://localhost:3000
   Backend: http://localhost:3001

docker compose up --build

Starts Postgres, backend (auto-migrates on boot), and frontend.

Duffel's sandbox only returns fictional "Duffel Airways" flights. To see real El Al data, use a production Duffel API key and set AIRLINE_IATA=LY in backend/.env.