feat(nix/host/orion): install docker

hosts/orion/modules/services/docker.nix

@@ -0,0 +1,21 @@
+{ pkgs, ... }:
+{
+  environment.systemPackages = with pkgs; [
+    docker
+    docker-compose
+  ];
+
+  virtualisation = {
+    oci-containers.backend = "docker";
+    containers.enable = true;
+    docker = {
+      enable = true;
+      rootless = {
+        enable = true;
+        setSocketVariable = true;
+      };
+      autoPrune.enable = true;
+      package = pkgs.docker;
+    };
+  };
+}

hosts/orion/modules/users.nix

@@ -1,4 +1,9 @@
-{ pkgs, config, ... }:
+{
+  pkgs,
+  config,
+  lib,
+  ...
+}:
 {
   security.sudo.wheelNeedsPassword = false;
   users.groups.price = { };
@@ -10,6 +15,7 @@
       extraGroups = [
         "wheel"
         "keyd"
+        (lib.mkIf config.virtualisation.docker.enable "docker")
       ];
       group = "price";
       shell = pkgs.zsh;