feat(minecraft): deploy journey-into-imagination PaperMC server

- PaperMC 26.1.2 via itzg/minecraft-server:2026.7.0
- Namespace: minecraft, Service: journey-into-imagination
- TCP port 10182 (non-standard) via ingress-nginx tcp forwarding
- Pure Storage CSI PVC (pure-block, 50Gi) for world data
- World seed hardcoded: -5177989977648707969
- RCON password via ExternalSecret + 1Password Connect
- SleepMost v5.6.2 plugin for single-player sleep
- Whitelist off at launch, toggle-ready
- ExternalDNS annotations for internal Technitium record
- Manual steps: UniFi port forward WAN:10182→10.1.71.80:10182,
  Cloudflare A record + SRV for journey-into-imagination.mk-labs.cloud

cluster/applications/minecraft/configmap.yaml

@@ -0,0 +1,45 @@
+---
+# server.properties overrides for Journey Into Imagination
+# itzg/minecraft-server reads these as environment variables and
+# writes them into server.properties on startup.
+# Full list: https://docker-minecraft-server.readthedocs.io/en/latest/configuration/server-properties/
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: papermc-config
+  namespace: minecraft
+  labels:
+    app.kubernetes.io/name: minecraft
+    app.kubernetes.io/component: papermc
+data:
+  # Server identity
+  MOTD: "Journey Into Imagination"
+  SERVER_NAME: "Journey Into Imagination"
+
+  # Game settings
+  GAMEMODE: "survival"
+  DIFFICULTY: "normal"
+  PVP: "true"
+  MAX_PLAYERS: "20"
+  ALLOW_FLIGHT: "true"
+  SPAWN_PROTECTION: "0"
+  SEED: "-5177989977648707969"
+
+  # Auth
+  ONLINE_MODE: "true"
+
+  # Whitelist — set to true when ready to lock down the server
+  WHITE_LIST: "false"
+  ENFORCE_WHITELIST: "false"
+
+  # Performance / tick safety
+  MAX_TICK_TIME: "180000"
+
+  # RCON (enabled so plugins/admin tools can connect)
+  ENABLE_RCON: "true"
+  RCON_PORT: "25575"
+
+  # Plugin auto-download — SleepMost for single-player sleep
+  # SleepMost v5.6.2: supports PaperMC 1.21.x (use latest release for 1.21.11+)
+  # Source: https://github.com/mrgeneralq/sleep-most/releases
+  PLUGINS: "https://github.com/mrgeneralq/sleep-most/releases/download/v5.6.2/SleepMost-5.6.2.jar"