app.py

from fastapi import FastAPI
from fastapi.responses import RedirectResponse
import subprocess
import threading

app = FastAPI()

# Start Open WebUI in background
threading.Thread(
    target=lambda: subprocess.run(["open-webui", "serve"]),
    daemon=True
).start()

# Redirect to Open WebUI's port (8080)
@app.get("/")
def home():
    return RedirectResponse(url="http://localhost:8080")