jd4 docker connect error: web:80 ssl:False [Connect call failed('127.0.0.1', 80)]

[libowen9003]

I'm using docker to bring up jd4 image. But jd4 never connects, saying:
(I changed the port to 80 in docker-compose.yaml)

Traceback (most recent call last):
File "/venv/lib/python3.5/site-packages/jd4/daemon.py", line 157, in daemon
await session.login_if_needed(config['uname'], config['password'])
File "/venv/lib/python3.5/site-packages/jd4/api.py", line 93, in login_if_needed
await self.judge_noop()
File "/venv/lib/python3.5/site-packages/jd4/api.py", line 85, in judge_noop
await self.get_json('judge/noop')
File "/venv/lib/python3.5/site-packages/jd4/api.py", line 47, in get_json
params=kwargs) as response:
File "/venv/lib/python3.5/site-packages/aiohttp/client.py", line 690, in aenter
self._resp = yield from self._coro
File "/venv/lib/python3.5/site-packages/aiohttp/client.py", line 267, in _request
conn = yield from self._connector.connect(req)
File "/venv/lib/python3.5/site-packages/aiohttp/connector.py", line 402, in connect
proto = yield from self._create_connection(req)
File "/venv/lib/python3.5/site-packages/aiohttp/connector.py", line 749, in _create_connection
_, proto = yield from self._create_direct_connection(req)
File "/venv/lib/python3.5/site-packages/aiohttp/connector.py", line 860, in _create_direct_connection
raise last_exc
File "/venv/lib/python3.5/site-packages/aiohttp/connector.py", line 832, in _create_direct_connection
req=req, client_error=client_error)
File "/venv/lib/python3.5/site-packages/aiohttp/connector.py", line 804, in _wrap_create_connection
raise client_error(req.connection_key, exc) from exc
aiohttp.client_exceptions.ClientConnectorError: Cannot connect to host web:80 ssl:False [Connect call failed ('127.0.0.1', 80)]
[I 230227 07:13:41 daemon:165] Retrying after 30 seconds
[E 230227 07:14:11 daemon:164] Cannot connect to host web:80 ssl:False [Connect call failed ('127.0.0.1', 80)]
Traceback (most recent call last):
File "/venv/lib/python3.5/site-packages/aiohttp/connector.py", line 797, in _wrap_create_connection
return (yield from self._loop.create_connection(*args, **kwargs))
File "/usr/lib/python3.5/asyncio/base_events.py", line 775, in create_connection
raise exceptions[0]
File "/usr/lib/python3.5/asyncio/base_events.py", line 762, in create_connection
yield from self.sock_connect(sock, address)
File "/usr/lib/python3.5/asyncio/selector_events.py", line 451, in sock_connect
return (yield from fut)
File "/usr/lib/python3.5/asyncio/futures.py", line 380, in iter
yield self # This tells Task to wait for completion.
File "/usr/lib/python3.5/asyncio/tasks.py", line 304, in _wakeup
future.result()
File "/usr/lib/python3.5/asyncio/futures.py", line 293, in result
raise self._exception
File "/usr/lib/python3.5/asyncio/selector_events.py", line 481, in _sock_connect_cb
raise OSError(err, 'Connect call failed %s' % (address,))
ConnectionRefusedError: [Errno 111] Connect call failed ('127.0.0.1', 80)

Anyone having the same problem?