Solution to a hanged “Preparing Home Installation” screen during new install on a vm

The whole system hung at the ‘preparing home installation’ screen.

dns problem

1. login
2. cd /mnt/data/supervisor/
3. cp dns.json bk_dns.json
4. use vi to add ,"dns://"
5. cd dns
6. cp coredns.json bk_coredns.json
7. use vi to add ,"dns://" twice
8. reboot

home assistant pulls docker image from