Add docker

modules/nixos/server/docker/default.nix

@@ -2,4 +2,31 @@
   imports = [
     ./media.nix
   ];
+
+  options.mods.docker.media = {
+    enable = lib.mkEnableOption {
+      default = false;
+      description = "enables docker containers for media server";
+    };
+  };
+
+  config = lib.mkIf config.mods.docker.media.enable {
+    environment.systemPackages = [
+      pkgs.arion
+
+       # Do install the docker CLI to talk to podman.
+       # Not needed when virtualisation.docker.enable = true;
+      pkgs.docker-client
+    ];
+
+    # Arion works with Docker, but for NixOS-based containers, you need Podman
+    # since NixOS 21.05.
+    virtualisation.docker.enable = false;
+    virtualisation.podman.enable = true;
+    virtualisation.podman.dockerSocket.enable = true;
+    virtualisation.podman.defaultNetwork.dnsname.enable = true;
+
+    # Use your username instead of `myuser`
+    users.extraUsers.${mods.user.name}.extraGroups = ["podman"];
+  };
 }

modules/nixos/server/docker/media.nix

@@ -1,4 +1,3 @@
-
 { pkgs, lib, config, ... }: {
   options.mods.docker.media = {
     enable = lib.mkEnableOption {