Add docker

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/system/configs/docker/default.nix

@@ -0,0 +1,24 @@
+{ pkgs, ... }:
+{
+  virtualisation.docker = {
+    enable = true;
+    enableOnBoot = false;
+    storageDriver = "btrfs";
+
+    daemon.settings = {
+      experimental = true;
+      ipv6 = true;
+      fixed-cidr-v6 = "fd00::/80";
+    };
+
+    autoPrune = {
+      enable = true;
+      flags = [ "--all" ];
+    };
+  };
+
+  environment = {
+    persistence."/persist".directories = [ "/var/lib/docker" ];
+    systemPackages = with pkgs; [ docker-compose ];
+  };
+}