fix PUBLIC_PORT

[MusclePr]

Context

• fix issue Environment variable PUBLIC_PORT does not apply to PalWorldSettings.ini. #389

Choices

• PUBLIC_PORT is different from PORT.

Test instructions

• run following test.sh

#!/bin/bash
if [ ! -f docker-compose.override.yml ]; then
cat > docker-compose.override.yml <<EOF
services:
  palworld:
    environment:
      PUBLIC_PORT: 8212
    healthcheck:
      test: rcon-cli info
EOF
fi
docker compose up -d
echo -n "wait healthy"
while [ ! "$(docker inspect palworld-server -f '{{.State.Health.Status}}')" = "healthy" ]; do
        sleep 1
        echo -n "."
done
echo " done."
docker compose down
sed -nre 's/.*(PublicPort=\w+).*/\1/p' palworld/Pal/Saved/Config/LinuxServer/PalWorldSettings.ini

Checklist before requesting a review

• I have performed a self-review of my code
• I've added documentation about this change to the README. Fixed to work according to README.
• I've not introduced breaking changes.