feat(FN-002): complete Step 3 — FastAPI Backend App Skeleton

apps/api/app/main.py

@@ -0,0 +1,22 @@
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from app.config import settings
+
+app = FastAPI(
+    title=settings.app_name,
+    debug=settings.debug,
+)
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["http://localhost:5173"],
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+
+@app.get("/health")
+def health() -> dict[str, str]:
+    return {"status": "ok", "service": settings.app_name}