# if `HOST_IP` is manually configured as env
HOST="$HOST_IP"

# try to get the ip of the host from ns host.docker.internal
if [[ -z "$HOST" ]]; then
  HOST=$(getent hosts host.docker.internal | awk '{ print $1 }')
fi

# try to get the linux host ip
if [[ -z "$HOST" ]]; then
  HOST=$(ip route | awk 'NR==1 {print $3}')
fi