Check if titlepack need to be updated

[celianvdb]

maniaplanet-docker/entrypoint.sh

Line 37 in 806f9f3

# TODO: Check if update is required first.

This can return you the last update timestamp of a titlepack.
curl -I -s ${TITLE_PACK_URL} | grep last-modified | cut -c16-40 | xargs -I {} date -d "{}" +%s

[celianvdb]

@tomvlk If you can add the enhancement label ;)