host(renko): add cassie to docker but don't apply by default

Changed files
+8
systems
renko
+8
systems/renko/docker.nix
···
enable = true;
storageDriver = "btrfs";
};
+
+
users.groups.docker.members = [
+
"cassie"
+
];
+
+
system.activationScripts.lock-docker-group = {
+
text = "gpasswd -R docker";
+
};
}