New docker container networks often take quite a sizable address pool /8 or 255.0.0.0.

New networks takes addresses like 172.18.0.0/8 and 172.19.0.0/8 which are often excessive for home use.

The default address pool can be changed via the daemon configuration file for Linux Docker.

To configure it, create or edit the configuration file at /etc/docker/daemon.json

{
  "bip": "172.17.0.1/16",
  "default-address-pools": [
    {
      "base": "172.19.0.0/16",
      "size": 24
    },
    {
      "base": "172.20.0.0/16",
      "size": 24
    }
  ]
}

What it does is to set the network for the default bridge bip to 172.17.0.1/16. It also set the network range (default-address-pool) for use by the containers' local network to 172.19.0.0/16 and 172.20.0.0/16.