containers: add wordpress

This is the start of my fun attempt at using NixOS containers for web
services as a Docker replacement.

After spending some time on other servers I realized that I don't
actually *need* my dotfiles on those servers, so it becomes
significantly faster to build these containers without worrying about
home-manager and command-line programs I use on the host.

Main advantages include web service configuration with Nix instead of
Docker. Disadvantages include increased complexity for anything that
isn't already maintained by others in nixpkgs.

containers/wordpress.nix

@@ -0,0 +1,33 @@
+{
+  nix-config,
+  pkgs,
+  ...
+}:
+
+{
+  imports = with nix-config.nixosModules; [
+    system
+  ];
+
+  users.defaultUserShell = pkgs.fish;
+
+  programs = {
+    fish.enable = true;
+    neovim.enable = true;
+  };
+
+  environment = {
+    systemPackages = with pkgs; [ kitty ];
+    shells = with pkgs; [ fish ];
+
+    variables = {
+      TERM = "xterm-kitty";
+    };
+  };
+
+  networking = {
+    firewall.allowedTCPPorts = [ 80 ];
+  };
+
+  services.wordpress.sites.localhost = { };
+}

modules/containers.nix

@@ -64,5 +64,20 @@ in
       localAddress = "192.168.100.49";
       config = ../containers/wine.nix;
     };
+
+    wordpress = {
+      privateNetwork = true;
+      ephemeral = true;
+      autoStart = true;
+
+      hostAddress = "192.168.100.24";
+      localAddress = "192.168.100.39";
+
+      specialArgs = {
+        inherit nix-config;
+      };
+
+      config = ../containers/wordpress.nix;
+    };
   };
 }