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/db.py

@@ -0,0 +1,14 @@
+from sqlmodel import SQLModel, create_engine, Session, text
+from app.config import settings
+
+engine = create_engine(settings.DATABASE_URL)
+
+def get_session():
+    with Session(engine) as session:
+        yield session
+
+def init_db():
+    with Session(engine) as session:
+        session.exec(text("CREATE EXTENSION IF NOT EXISTS vector"))
+        session.commit()
+    SQLModel.metadata.create_all(engine)