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)

frontend/nginx.conf

@@ -0,0 +1,16 @@
+server {
+    listen 80;
+    server_name _;
+    root /usr/share/nginx/html;
+    index index.html;
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    location /api/ {
+        proxy_pass http://tamagotchi-api:8080/api/;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+    }
+}