Initial commit: minecraft server setup

Tracks docker-compose config, server scripts, and server properties.
Runtime data (world, libraries, versions, logs, jar), credentials, and
backup snapshots are gitignored.

start.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+set -e
+
+cd "$(dirname "$0")"
+
+docker compose up -d
+
+nohup ./portforward >> portforward.log 2>&1 &
+echo $! > portforward.pid
+
+echo "minecraft started; tunnel PID $(cat portforward.pid) (logs: portforward.log)"