L2J Mobius High Five docker setup

game/Dockerfile

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+ARG BUILD_IMAGE=l2j-build:latest
+FROM ${BUILD_IMAGE} AS builder
+
+FROM eclipse-temurin:25-jdk AS runtime
+
+RUN useradd -m l2j
+WORKDIR /l2j
+
+COPY --from=builder /out/game /l2j
+COPY game/entrypoint.sh /l2j/entrypoint.sh
+
+RUN chmod +x /l2j/entrypoint.sh \
+    && mkdir -p /l2j/log \
+    && chown -R l2j:l2j /l2j
+
+USER l2j
+
+# Игровой порт (по умолчанию 7777) + порт телнета GM-консоли при необходимости
+EXPOSE 7777
+
+ENTRYPOINT ["/l2j/entrypoint.sh"]

game/entrypoint.sh

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+#!/usr/bin/env bash
+set -euo pipefail
+
+if [ -d /l2j/config_override ] && [ -n "$(ls -A /l2j/config_override 2>/dev/null)" ]; then
+  echo "[game] applying config overrides from /l2j/config_override"
+  find /l2j/config_override -type f | while read -r f; do
+    rel="${f#/l2j/config_override/}"
+    dest="/l2j/$rel"
+    mkdir -p "$(dirname "$dest")"
+    cp "$f" "$dest"
+    echo "[game]   -> $dest"
+  done
+fi
+
+echo "[game] waiting for mysql at ${DB_HOST:-mysql}:${DB_PORT:-3306} ..."
+until (echo > /dev/tcp/"${DB_HOST:-mysql}"/"${DB_PORT:-3306}") 2>/dev/null; do
+  sleep 2
+done
+
+echo "[game] waiting for loginserver at ${LOGIN_HOST:-loginserver}:${LOGIN_PORT:-9014} ..."
+until (echo > /dev/tcp/"${LOGIN_HOST:-loginserver}"/"${LOGIN_PORT:-9014}") 2>/dev/null; do
+  sleep 2
+done
+
+echo "[game] dependencies are up, starting GameServer"
+
+cd /l2j
+
+CLASSPATH="libs/*"
+
+if [ -f "libs/GameServer.jar" ]; then
+  exec java -Xms4g -Xmx4g -Dfile.encoding=UTF-8 -cp "$CLASSPATH" -jar libs/GameServer.jar
+else
+  echo "[game] Не найден libs/GameServer.jar. Содержимое /l2j:"
+  find /l2j -maxdepth 2
+  exit 1
+fi