Initial project scaffolding for health tracker app

Set up backend and frontend structure for a health and fitness tracker using Python (FastAPI, SQLModel, DSPy) and React. Includes Docker and Compose configs, authentication, nutrition AI module, health/nutrition/user endpoints, database models, and basic frontend with routing and context. Enables tracking nutrition, health metrics, and user management, with architecture ready for future mobile and cloud deployment.

backend/app/models/user.py

@@ -0,0 +1,10 @@
+from datetime import datetime
+from typing import Optional
+from sqlmodel import Field, SQLModel
+
+class User(SQLModel, table=True):
+    id: Optional[int] = Field(default=None, primary_key=True)
+    username: str = Field(index=True, unique=True)
+    email: str = Field(index=True, unique=True)
+    password_hash: str
+    created_at: datetime = Field(default_factory=datetime.utcnow)