Stack LAMP was not used for years so it was completely outdated was not working anymore.
The stack was rewritten to make it works with php7.3
Use mariadb from stack/erp5 because we won't code again all feature done there for mariadb, initialization and backup to have it up-to-date.
Delete old files which are not used anymore
Remove integrated resilience scripts, resilience will works with webrunner which is more stable today.