Create app.py

app.py

@@ -0,0 +1,15 @@
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+app = FastAPI()
+
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+@app.get("/health")
+async def health():
+    return {"status": "ok", "message": "SubFlow backend is running"}