feat: testing vm recipe

what i'm still figuring out is port forward (and how to target dns resolution?),
otherwise i'd need to add graphical session and a browser into vm

.gitignore

@@ -3,3 +3,4 @@
 /dump.rdb
 /result
 /routes/static/out.css
+/nixos.qcow2

flake.nix

@@ -38,7 +38,40 @@
               ${pkgs.nodePackages.tailwindcss}/bin/tailwindcss -i routes/in.css -o routes/static/out.css
             '';
           };
+
           default = some-automoderation;
+
+          # for testing whole deployment locally
+          # nixos-rebuild build-vm --flake .#test-container
+          nixosConfigurations.test-container = nixpkgs.lib.nixosSystem {
+            system = "x86_64-linux";
+            modules = [
+              nixosModules.some-automoderation-module
+              ({ ... }: {
+                nix = {
+                  extraOptions = ''
+                    experimental-features = nix-command flakes
+                  '';
+                };
+                networking.firewall.enable = false;
+                users.groups.test = {};
+                users.mutableUsers = false;
+                users.users.test = {
+                  isNormalUser = true;
+                  password = "test";
+                  extraGroups = [ "wheel" "networkmanager" ];
+                  group = "test";
+                };
+                services.some-automoderation = {
+                  enable = true;
+                  host = "some-automoderation.sunshine.industries";
+                  useNginx = false;
+                  port = 9090;
+                  redisPort = 9999;
+                };
+              })
+            ];
+          };
         };
         nixosModules.some-automoderation-module = { lib, pkgs, config, ... }:
           let