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.

portforward

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+# Get the first parameter as LOCAL_PORT (default to 25565 for Minecraft)
+LOCAL_PORT=${1:-25565}
+
+# Get the second parameter as OFFSET (default to 0 so public port == local port)
+OFFSET=${2:-0}
+
+# Calculate the PUBLICPORT by adding the OFFSET to the LOCAL_PORT
+PUBLICPORT=$(($LOCAL_PORT + OFFSET))
+
+# SSH host alias (defined in ~/.ssh/config)
+SSH_HOST="spotbot"
+
+echo " $SSH_HOST:$PUBLICPORT -->  localhost : $LOCAL_PORT "
+
+# Run SSH command to create a reverse tunnel from the server
+while true; do
+  autossh -M 0 -N \
+    -R 0.0.0.0:$PUBLICPORT:localhost:$LOCAL_PORT \
+    -o "ServerAliveInterval 20" -o "ServerAliveCountMax 3" \
+    $SSH_HOST
+  sleep 5
+done