Minecraft 26.2 Fabric server stack with CraftDeck management panel

- docker-compose: itzg/minecraft-server (Fabric, offline mode, whitelist
  enforced, Modrinth-managed mods), itzg/mc-backup sidecar, custom dashboard
- Gated auth for offline mode: approve username -> whitelisted with a short
  registration window -> EasyAuth /register + /login; auto-revoke on expiry
- CraftDeck panel (Next.js 16, zero native deps): live console (SSE), players
  & stats, lag diagnostics (server TPS vs player ping via spark), performance
  graphs, Modrinth mod search/manager, backups & restore, sandboxed file
  browser/editor, .env config editor with compose apply, cron schedules,
  Discord alerts, scrypt-hashed panel login
- scripts/setup.sh generates secrets; docs/ covers auth, mods, updating,
  backups, networking (Tailscale), troubleshooting

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

scripts/setup.sh

@@ -0,0 +1,35 @@
+#!/usr/bin/env bash
+# One-time setup: creates .env with generated secrets, prepares data dirs.
+# Usage: ./scripts/setup.sh
+set -euo pipefail
+cd "$(dirname "$0")/.."
+
+if [[ -f .env ]]; then
+  echo ".env already exists — leaving it untouched."
+  echo "Delete it first if you really want to regenerate secrets."
+  exit 1
+fi
+
+command -v openssl >/dev/null || { echo "openssl is required"; exit 1; }
+
+rcon_pw="$(openssl rand -hex 24)"
+session_secret="$(openssl rand -hex 32)"
+admin_pw="$(openssl rand -base64 12 | tr -d '/+=' | cut -c1-16)"
+
+sed -e "s|^RCON_PASSWORD=.*|RCON_PASSWORD=${rcon_pw}|" \
+    -e "s|^PANEL_SESSION_SECRET=.*|PANEL_SESSION_SECRET=${session_secret}|" \
+    -e "s|^PANEL_ADMIN_PASSWORD=.*|PANEL_ADMIN_PASSWORD=${admin_pw}|" \
+    .env.example > .env
+
+mkdir -p data/mc data/backups data/dashboard
+
+echo
+echo "  ✔ .env created with generated secrets"
+echo "  ✔ data directories prepared"
+echo
+echo "  Dashboard login (you must change this password on first login):"
+echo "      username: admin"
+echo "      password: ${admin_pw}"
+echo
+echo "  Next:  docker compose up -d"
+echo "  Panel: http://<server-ip>:8080   Minecraft: <server-ip>:25565"