Move minecraft srver into module

modules/minecraft-server/default.nix

@@ -0,0 +1,19 @@
+{ pkgs, ... }:
+
+{
+  services.minecraft-server = {
+    enable = true;
+    eula = true;
+    openFirewall = true;
+    declarative = true;
+    serverProperties = {
+      difficulty = 3;
+      enable-rcon = true;
+      "rcon.password" = "test";
+      motd = "\\u00A7cWake up to reality! Nothing ever goes as planned in this accursed world.☯";
+      spawn-protection = 0;
+      level-type = "minecraft:amplified";
+      level-name = "amplified_world";
+    };
+  };
+}