meta: Add dev container

Note that this container uses home-manager from the Nix flake on the
host system, which is pretty cool.

Currently modules in this repository *don't* differentiate between
home-manager and nixos, but this could be changed in the future to
support e.g. my home-manager neovim config on a non-nixos system.

containers/dev.nix

@@ -0,0 +1,62 @@
+{ home-manager, ... }:
+let
+  VARIABLES = import ../src/variables.nix;
+in
+{
+  containers.dev = {
+    privateNetwork = true;
+    ephemeral = true;
+    autoStart = true;
+    hostAddress = "192.168.100.30";
+    localAddress = "192.168.100.31";
+
+    bindMounts = {
+      "/mnt" = {
+        hostPath = "/home/${VARIABLES.username}/containers/dev";
+        isReadOnly = false;
+      };
+    };
+
+    config = { pkgs, lib, ... }: {
+      imports = [
+        home-manager.nixosModules.home-manager
+        ../modules/git
+        ../modules/neovim
+      ];
+
+      programs = {
+        fish.enable = true;
+        neovim.enable = true;
+        starship.enable = true;
+      };
+
+      users = {
+        defaultUserShell = pkgs.fish;
+        mutableUsers = false;
+        allowNoPasswordLogin = true;
+
+        users.user = {
+          isNormalUser = true;
+          home = "/home/user";
+        };
+      };
+
+      home-manager.users.user = { pkgs, ... }: {
+        home.packages = [ pkgs.atool pkgs.httpie ];
+        home.stateVersion = VARIABLES.stateVersion;
+      };
+
+      environment = {
+        shells = with pkgs; [ fish ];
+
+        variables = { TERM = "xterm-kitty"; };
+
+        defaultPackages = [ ];
+      };
+
+      environment.systemPackages = with pkgs; [ kitty ];
+
+      system.stateVersion = VARIABLES.stateVersion;
+    };
+  };
+}

src/main.nix

@@ -15,6 +15,7 @@ let VARIABLES = import ./variables.nix; in {
     ../modules
     ../containers/rar.nix
     ../containers/wine.nix
+    ../containers/dev.nix
   ];
 
   # locale