feat: update stuff

nixos/mirai/services/minecraft.nix

@@ -1,9 +1,25 @@
-{...}: {
+{pkgs, ...}: {
   services = {
     minecraft-server = {
       enable = true;
       openFirewall = true;
       eula = true;
+      declarative = true;
+      serverProperties = {
+        online-mode = false;
+        motd = "Servius's Minecraft Server";
+        level-seed = "4504535438041489910";
+        view-distance = 24;
+      };
+      package = let
+        getJavaVersion = v: (builtins.getAttr "openjdk${toString v}" pkgs.javaPackages.compiler).headless;
+      in
+        pkgs.minecraft-server.override {
+          url = "https://piston-data.mojang.com/v1/objects/6e64dcabba3c01a7271b4fa6bd898483b794c59b/server.jar";
+          sha1 = "sha1-bmTcq7o8AacnG0+mvYmEg7eUxZs=";
+          version = "1.21.6";
+          jre_headless = getJavaVersion 21;
+        };
     };
   };
 }