init minecraft server configs!

modules/discord.nix

@@ -0,0 +1,36 @@
+{ config, pkgs, ... }:
+
+let
+  mcDataDir = "/srv/minecraft/data";
+in
+{
+  systemd.services.minecraft-discord-config = {
+    description = "Inject Discord bot token into Discord4Fabric config";
+    wantedBy = [ "multi-user.target" ];
+    before = [ "docker-minecraft.service" ];
+    after = [ "agenix.service" ];
+    serviceConfig = {
+      Type = "oneshot";
+      ExecStart = pkgs.writeShellScript "setup-discord4fabric" ''
+        CONFIG_DIR="${mcDataDir}/config/discord4fabric"
+        mkdir -p "$CONFIG_DIR"
+
+        TOKEN=$(cat ${config.age.secrets.discord-bot-token.path})
+
+        cat > "$CONFIG_DIR/config.json" <<EOF
+{
+  "botToken": "$TOKEN",
+  "guildId": "849685154543960085",
+  "channelId": "1482269524571979899",
+  "chatMessageFormat": "**%player%** > %message%",
+  "joinFormat": "%player% joined the server",
+  "leaveFormat": "%player% left the server",
+  "deathFormat": "%message%",
+  "advancementFormat": "%player% has made the advancement **%advancement%**",
+  "discordToMinecraftFormat": "[Discord] <%user%> %message%"
+}
+EOF
+      '';
+    };
+  };
+}