moved common out of systems

common/global/docker.nix

@@ -0,0 +1,28 @@
+{ lib, ... }:
+{
+  users = {
+    users.docker-service = {
+      isSystemUser = true;
+      group = "docker-service";
+      extraGroups = [ "docker" ];
+      uid = 600;
+    };
+    groups.docker-service = {
+      gid = 600;
+    };
+  };
+
+  virtualisation.docker = {
+    enable = lib.mkDefault true;
+    logDriver = "local";
+    storageDriver = "overlay2";
+    daemon.settings = {
+      experimental = true;
+      exec-opts = [ "native.cgroupdriver=systemd" ];
+      log-opts = {
+        max-size = "10m";
+        max-file = "5";
+      };
+    };
+  };
+}