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/api/v1/endpoints/users.py

@@ -0,0 +1,36 @@
+from typing import Any
+from fastapi import APIRouter, Depends, HTTPException
+from sqlmodel import Session, select
+
+from app.api import deps
+from app.core import security
+from app.models.user import User
+from app.schemas.user import UserCreate, UserRead
+
+router = APIRouter()
+
+@router.post("/", response_model=UserRead)
+def create_user(
+    *,
+    session: Session = Depends(deps.get_session),
+    user_in: UserCreate,
+) -> Any:
+    """
+    Create new user.
+    """
+    user = session.exec(select(User).where(User.email == user_in.email)).first()
+    if user:
+        raise HTTPException(
+            status_code=400,
+            detail="The user with this email already exists in the system",
+        )
+    
+    user = User(
+        email=user_in.email,
+        username=user_in.username,
+        password_hash=security.get_password_hash(user_in.password),
+    )
+    session.add(user)
+    session.commit()
+    session.refresh(user)
+    return user