feat: Initial Tamagotchi as a Service 🐣

- 3-tier architecture: Frontend (Nginx) → API (Node.js) → PostgreSQL
- Custom Prometheus metrics: hunger_level, happiness_score, energy_level
- Creature decay loop: stats degrade every 15 seconds
- Bilingual UI (EN/FR)

api/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "tamagotchi-api",
+  "version": "1.0.0",
+  "description": "Tamagotchi as a Service — Backend API with Prometheus metrics",
+  "main": "server.js",
+  "scripts": {
+    "start": "node server.js",
+    "dev": "node --watch server.js"
+  },
+  "dependencies": {
+    "express": "^4.21.0",
+    "pg": "^8.13.0",
+    "prom-client": "^15.1.0",
+    "cors": "^2.8.5",
+    "uuid": "^10.0.0"
+  }
+}