guys why do railway return `Application failed to respond` whenever im trying to access my app

import aiohttp
from aiohttp import web

async def request_handler(request):
    print(f"Received request: {request.method} {request.path}")
    return web.Response(text="Hello, world!")

async def on_startup(app):
    print("Server started")

async def on_shutdown(app):
    print("Server shutting down")

app = web.Application()
app.router.add_get('/', request_handler)

app.on_startup.append(on_startup)
app.on_shutdown.append(on_shutdown)

if __name__ == "__main__":
    web.run_app(app, port=8080)

import aiohttp
from aiohttp import web

async def request_handler(request):
    print(f"Received request: {request.method} {request.path}")
    return web.Response(text="Hello, world!")

async def on_startup(app):
    print("Server started")

async def on_shutdown(app):
    print("Server shutting down")

app = web.Application()
app.router.add_get('/', request_handler)

app.on_startup.append(on_startup)
app.on_shutdown.append(on_shutdown)

if __name__ == "__main__":
    web.run_app(app, port=8080)