feat: add Phase 1 infrastructure skeleton

Backend (FastAPI):
- docker-compose with all 4 services
- FastAPI app with health endpoints
- SQLAlchemy models for all tables
- Placeholder API endpoints for all routes
- Config and database modules
- requirements.txt with all dependencies

Frontend (React):
- package.json with React, Tailwind, React Query, React Router
- Vite config with API proxy
- Tailwind and TypeScript configs
- Basic App with routing skeleton
- Placeholder pages (Dashboard, MealDetail, Pantry)

Infrastructure:
- nginx config for reverse proxy
- Dockerfile for backend and frontend

backend/app/main.py

@@ -0,0 +1,41 @@
+from fastapi import FastAPI, Depends
+from sqlalchemy.orm import Session
+from app.database import get_db, engine, Base
+from app.models import family_profile, ingredient, recipe, meal_plan, home_pantry, feedback, grocery_item, scrape_log, email_log
+from app.config import settings
+import logging
+
+logging.basicConfig(level=settings.LOG_LEVEL)
+logger = logging.getLogger(__name__)
+
+app = FastAPI(
+    title="MealPlanner",
+    description="Self-hosted meal planning system",
+    version="0.1.0",
+)
+
+Base.metadata.create_all(bind=engine)
+
+
+@app.get("/health")
+def health_check(db: Session = Depends(get_db)):
+    return {"status": "ok"}
+
+
+@app.get("/health/db")
+def health_check_db(db: Session = Depends(get_db)):
+    try:
+        db.execute("SELECT 1")
+        return {"status": "ok", "database": "connected"}
+    except Exception as e:
+        return {"status": "error", "database": "disconnected", "error": str(e)}
+
+
+from app.api import profile, recipes, meals, shopping_list, pantry, admin
+
+app.include_router(profile.router, prefix="/api/profile", tags=["profile"])
+app.include_router(recipes.router, prefix="/api/recipes", tags=["recipes"])
+app.include_router(meals.router, prefix="/api/meals", tags=["meals"])
+app.include_router(shopping_list.router, prefix="/api/shopping-list", tags=["shopping-list"])
+app.include_router(pantry.router, prefix="/api/pantry", tags=["pantry"])
+app.include_router(admin.router, prefix="/api/admin", tags=["admin"])