termux-packages/root-packages/docker/daemon.json

{
    "data-root": "/data/docker/lib/docker",
    "exec-root": "/data/docker/run/docker",
    "pidfile": "/data/docker/run/docker.pid",
    "hosts": [
        "unix:///data/docker/run/docker.sock"
    ],
    "storage-driver": "overlay2"
}