chore: init monorepo snapshot

wolai-backend/app/main.py

@@ -0,0 +1,25 @@
+from typing import Dict
+
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from app.config import settings
+from app.routers import api_router, root_router
+
+app = FastAPI(title="Wolai Backend", version="0.1.0-stage0")
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=[settings.frontend_url, "http://localhost:3000", "http://localhost:3001"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+app.include_router(root_router)
+app.include_router(api_router)
+
+
+@app.get("/")
+async def root() -> Dict[str, str]:
+    return {"message": "Wolai backend stage0 up"}