ignition.json

{
  "ignition": { "version": "3.0.0" },
  "passwd": {
    "users": [
      {
        "name": "shyim",
        "sshAuthorizedKeys": [
          "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBuZPgjmIp/dZ0HzRpoFDLsAqFwRGuFBwJiu9qk22tHP"
        ],
        "groups": [
          "docker",
          "wheel",
          "sudo"
        ]
      }
    ]
  }
}