Docker not resolving local hostnames anymore

I can’t ping local hostnames anymore from within the docker container anymore. Pinging e.g. google.com still works.

host’s /etc/resolv.conf

domain fritz.box
nameserver 192.168.188.1

docker’s /etc/resolv.conf

search local.hass.io
nameserver 172.30.32.3

This means I have to change all script hostnames to an ip like e.g. raspberrypi to 192.168.188.100 etc.

shell_command:
  restart_bar: "ssh -i /config/ssh/id_rsa foo@raspberrypi 'sudo systemctl restart bar.service'"