🏓 Initial ServeSync demo build

- FastAPI backend with PostgreSQL + Redis
- 4 core features: Registration, Courts, Matchmaking, Tournament
- Double elimination tournament with bracket visualization
- ELO-based matchmaking (Stage 1 Open, Stage 2 Skill-Based)
- Real-time WebSocket updates
- TV Screen display for courts
- Vue 3 + Tailwind CSS frontend
- Seed data: 12 players, 4 courts, active matches, tournament in progress
- Docker compose stack with Nginx reverse proxy

backend/app/config.py

@@ -0,0 +1,15 @@
+from pydantic_settings import BaseSettings
+from typing import Optional
+
+
+class Settings(BaseSettings):
+    DATABASE_URL: str = "postgresql://servesync:servesync@db:5432/servesync"
+    REDIS_URL: str = "redis://redis:6379"
+    SECRET_KEY: str = "servesync-demo-secret-key-2024"
+    DEBUG: bool = True
+
+    class Config:
+        env_file = ".env"
+
+
+settings = Settings()