georgeartem
Hello :)
I also faced the same problem do to use internal network Docker on Windows 11 with Ubuntu.
Did you tried to send the command directly to your Docker like in the tutorial?
Example:
docker exec -it gigawallet sh -c 'curl -X POST http://localhost:8081/account/shibe1 -H "Content-Type: application/json" -d '\''{
"payout_address": "DSVw8wkkTXccdq78etZ3UwELrmpfvAiVt1",
"payout_threshold": "0",
"payout_frequency": "0"
}'\'''