This project demonstrates a simple Node.js service that stores reservations in Firestore (using the local emulator).

Files added:

• src/index.js - Express API with POST /reservations
• src/firebase.js - Firestore client initialization
• src/seed.js - seed sample inventory and user documents
• docker-compose.yml - runs a Firestore emulator and the API service

Quick start (macOS):

1. Build and start the emulator + API:

docker-compose up --build

1. In a new terminal, seed sample data (runs inside host Node):

npm install
npm run seed

1. Create a reservation:

curl -X POST http://localhost:3000/reservations \
  -H 'Content-Type: application/json' \
  -d '{"instrument_id":"<instrument-id>","user_id":"<user-id>","start_date":"2025-10-18T10:00:00Z","end_date":"2025-10-19T10:00:00Z"}'

Notes:

• The emulator runs at localhost:8080 and the API is configured via FIRESTORE_EMULATOR_HOST in docker-compose.yml so the Admin SDK talks to the emulator.
• Collections created: inventory, user, reservation. IDs are UUIDs.