更改docker bridge接口默认IP

docker bridge接口默认IP是10.17.0.0/16，如果改变该地址，需要修改daemon.json 配置

$ cat /etc/docker/daemon.json
{
        "insecure-registries": ["cqa-docker-registry:5000"],
        "bip": "192.168.6.1/24",
        "fixed-cidr": "192.168.6.0/25"
}

$ sudo systemctl restart docker.service